Document oMQD3VOddY921x2emz81922YE

"DUCO CEMENT willfix everything LIKE NEW!" OW you can mend things that you couldn't mend like a leech. You can make scrap-books or paste photo N before. And you can build things stronger than ever graphs in an album with it and you'll have no trouble because the famous tin Pont laboratories are producingwith curling pages or pictures. Duco Cement doesn't this new cement for you . . . an easy-to-use cement that shrink paper. slicks together for keeps! It is called Duco Household Cement. It is waterproof, quick drying and transparent. You'll find uses for Duco Cement at home, at the work bench, in the garage, at the office or studio. In fact, you You can use Duco Cement in lots of places where ordi will find it handy and easy to use everywhere. You can nary mucilage or glue won't hold. Use it on ivory, metal, probably get Duco Cement at your neighborhood hard leather, wood, marble, china, celluloid, cloth, paper, on ware dealer or druggist. But if he doesn't have it, write anything except rubber. You can mend glass with it. direct to K. I. du Pont de Nemours & Co., Inc., Industrial Duco Cement is transparent and sticks to glass surfaces Finishes Division, Parlin, N. J. DUCO HOUSEHOLD CEMENT Vo i.# X X V THE DU PONT MAGAZINE 'CBKUAKY. V)M \!u. 2 EXPLOSIVES-A CIVILIZING FORCE1 A// .'jpprtr/jf/v}/ /;} iUi hnhuiry irbo.ie products fh/ir yyeafh x/m7V;v;/u/ tin- icovfif\v puJi/ztrhil progre.s c io o d mjuiv * if us, 1 imagine, labor under a misapprehension about die explosives industry, When we think of explosives, we think gener ally of war, with all ol the ghastly wreckage that follows m the wake of screaming slid Is, smashing niudune gun lire, bursting shrapnel, and the vast munitions plants whose feverish furnaces in war-tune cast a lurid glow upon the skv itt night, pouring our these ominous media of destruction. So, all too often, we conceive of explosives .is merely an mstrumcntalhy of havoc. Bin: dial conception is utterly wrong. It needs to he corrected. Lx plumes are playing in the modern world a role diamcrricaJI v diflcrenr from and more important than- -that of a destroyer. They are a constructive, helpful nisinmier-r a truly tremendous civilizing force. J hey tear tluwn, and tear up, :n order that men may build more splendid! v and produce with greater eihcienc v and case. They are an indispensable element in rapid peace-time progress. Here is ore thing to hear in mind: I bar is really a grear difference between rhe explosives used in war ^nd those that are employed for com mercial work. Neither the machinery nor the workers producing tile explo sives used for war, nor those products themselves, can be used forcomniercial work and the reverse is also true. -( .m.i ( i.'iini.m |iru;i.L;i-*i u: Be DR. JULIUS KLEIN Ajxiisr AV I Shi 1< I.TAiiY Oh ( c IM M Kin I The two groups are com pi etch distinct industries. hath vearahutir million pounds of commercial explosives arc used for pence- rime work in the t .Hired States. The a mourn of commercial ex plus; \es luaiuifactured m this coin, try during J ipgi mII mk m Mr jpilf I JmB, jl iMf mI JBSllit T:T MM a J 1 ;*C!T :wvvr**c.c -:rv. f; Jhh assagaIi BwHl the past four years is about equal to die total output of military explosives of ad kinds used by all of the .Allied forces during the entire four year.-.' duration of the World War, jest how did we employ these millions of pounds oi blasting powder. dynamite, and the like? In the first place, a little more than one-third of I he total was used in the coal-mining industry. About a fifth was used :n metal-mining activity. One-sixth was devoted to L|tiarr\ mg and the pro duction of iinn-mctaliic minerals. One sevend] went lor gun era 1 con struction work such as rhe b-aildirg of railways, hvJrotdectric plants, irrigation projects, ship chaimels, water lines, suhwavs, and foundation excavations. Other purposes took the rrm;ii ning mu- eighrh inc Aiding a Ik mi 2.0 million pounds on .American onus in clearing stumps, removing ,ee ami log jam*, and sen ing other dmihirh vital ends. A Fo r m oi Fu w i:r Explosives are a constructive ci vifi/mg force bemuse t-iec are a form of power-- and power is the kevnote of rhr modem age. lake steam and electricity, explosives a re a means of lifting a load of racking toil from the human race. We may-t hink of a charge of high explosives as a small bundle of intensely concentrated energy, waiting man's word to he released suddenly to do rhe work that a thousand men could not do without its aid. A massive piece of stone, a solid wall of rock, is redirect! in the twite Id mg of an eve to a mass of fragments OVX ihat can he readily moved by a steam shm el. What a spiking u.mu asi lu die drudgery and ton ail that pre\ailed in ages past! We admire the prodigious material achievements of anticjuirv the mighty pyramids of Egypt and of Mexico, the Great Wall uf Cdiimi. the Roman aqueducts and Catacombs, the mysterious titanic: masonry of the Incas in Peru and Bolivia, the marbicquarncsof Pent cl ivus from which the gleaming temple uf the Parthenon was wrought. Ikit think ot the parhvrk all v mult: imple ments with which the materials for these vvew obtained from the hard resistant body uf the earth think of the primitive bronze pLks, the stone hammers, the wooden wedges inserted bet ween cracks ant] then soaked in water to make them swell and split the stone. Think of the infinite slowness of the process the \ea rs, the decades, that passed a wav while such work was being carried out. And think, too, of the armies of wretched, desperate slaves strain ing, gasping, groaning under the mere.iless taskmaster's Jash and the blistering ravs of a southern sun! Dy n Amu it im Lj iij :r a t o r Dynamite has changed all that. And thus, dynamite is not only an accelerator bur a libera tor, of the verv first rank. 'Hie art of mining gold, silver, iron and copper was known as far back as the patriarchal da vs of Job. Those metals contributed to the4 fabulous magnificence of Solomon and of every great ruler and conqueror after him. But did you ever ask yourself this question; J low did it happen that we had to wait thousands of years for their full development? What caused this great "gap" in the prog ress of the human use of metals and their prndurrs an a large scaled And the steam engine and our other modern machinery could not be fully developed without uni inn led quanti ties of iron and copper and unlimited fuel for l Iic generation of steam. It was because adequate amounts of these essentials could not he obtained without powerful explosives. With out. these, the steam engine would have remained merely the strange phveiling of some obscure eccentric ainl mankind would have been the poorer. Thus, the super force, dvna mite, bewuuc a \critahle Aladdin s lamp for the budding industrialism of our modem life. Exrnosi vr.s Rh l u a s i; Ra w Ma t e r ia l s Hint is tile conviction of the cxplo sives experts to whom I am indebted for some of the facts char l shall mention in this talk; and I desire, to make very special mention of Dr. Charles K. M tin roe, surelv one of the most distinguished of nil world authorities on explosives, who, 1 am proud to say, is connected with the Department of Commerce. Our railways, passing over mighty hills, through great cuts and tunnels ext a cared through the verv heart of mountains, furnish mure witness to the achievements of powerful explo sives. Most: of our manufactured products begin as raw materials, and many major raw materials exist pri marily in mineral deposits, so wc can truthfully say that high explosives enter into our daily lives in many wavs that few of us ever suspect. The towering skyscraper has a skeleton of steel beams, without which it could not exist, and before the steel was in ts present form it was Bun ore - ani til is iron ore was broken from its original position ill the mine by charges of high cxplosi ves. The superb concrete highways over which we travel arc made of cement that was once iiiiiesLOiie and cement rock, formmg great quarry walls of massive stone, and only by the use of high explosives can these materials he economically mined and the cement hidjstry made possible. l et us glance for just a moment at tile history of explosives, Black pow dcr or gunpowder, as it was known in early days) is made, J need hardly say, of a median teal tntmsre uf saltpeter, charcoal and sulphur. The Chinese* probably discovered it in remote- times, fr made its appearance in Europe in the fourteenth century, following its development by Roger Bacon, the famous monk that courageous, canny pioneer of modern learning. JP.-VCr K Two Mri'R.ooL\ci:Ri?e In 18.47 an Italian chemist, named Suhrcro, discovered the chemical combination that we know today as nitroglyeerin. Alrhch igh hc pointed out the possibilities of his discovery' as an explosive, the substance was actually used in his clay only in aleo holic solution for medicine (it is of great value as a he<j.rt stimulant, in the almost incredible proportion of r pair to i j i 51,000). hi the middle decades of the past century, California was a veritable laboratory of explosives, because of the great requirements of gold min ing. And that reminds me of the strange accident that happened a couple of generations ago hi the Wei Is-Fa rgo Building, a curious four or five story stone structure that still stands in the heart 0/ San Francisco's business district. One day chore arrived in that building an express package which seemed to be leaking. With rhe idea of opening it and remedying this situation, an employe gave a vigorous rap with a hammer on the mysterious container. The result was a terrific blast that virtually gutted tlie building and wrought appalling havoc. That was the Pacific Boast's introduction to nitroglycerin, a suhstariLe which has since been invaluable to mining, J umbering, farming, and mu n v other great industries in the Ear West. Dy n a m ire It was In 1 $67 that Alfred Nohd, the Swedish inventor, discovered a practical process of making nitro glycerin on a large commercial scale, and five year's later he invented dyna mite -by absorbing the nitroglycerin man earth like porous material similar to "fuller's earth." He thereby revo lutionized the art of mining and its thousands of industrial ramifications. It: is a rather curious paradox that the famous Nobel prizes -for contribu tions to world peace, for achievements in the realm of imaginative 1 henming and so on had their origin hi money t h a r w a s m .1 d e fro m d yn:imitc. Dynamite has, of course, been im proved since Nobel's day, in ways that l have not time to mention in detail. Explosives are used today in many (lOminncd an payy 2/; TWO NEW LUXURY LINERS A w j mt i:r v a c a t io n . . . Havana at: its gayest :md friendliest season . . , ddighdully old and quaint homes and narrow streets to see , . . tennis* boating l )i ha tiling ior Ja) time diver sions, if v o j prefer . . , dancing in the casinos at night! Whether y o u desire gayerv, sports or relaxation, this city has much in store to male your trip well worth while- Most enjoyable, too, is the trip to Havana on either of the Ward lines two modern liners, the "Morm Castle" and the "Oriente." After seeing these boats, even the most exaetmgtraveler hemamas enthusiastic over them, From the time one leaves Hew York until he lands in Havana, less than sixty hours hirer, life ahoun these two young speedsters is enjoy able and comfortable. Th;ise niagnilicent liners were de signed by Theodore E. Ferris. They a re of i m posing appearance with seven decks, including four tier* oi super structure comprising the steel erec tions above tile bridge deck, and are of the complete superstructure type Each vessel has an overall length oi 508 feet, a beam of 70 feet 9 indies and a loaded draft oi :.f feet. The liners represent the most ad- fl The "Alorro Cjsfle" and the "Oaenteh tin 'ho-t/ictr/Ci /If v [rape//uf sh/p.x, a're a t a i/t .nidition s ta the WarT Lrne m Hr ETHEL R. ARMSTRONG; v a need practice in engineering by the use of electricif v as a propelling svseein, The iiiaihmcry consists of two sets ol nirho-electrit generators and motors and six oil-burning, waterrube boilers oi seven bees each, operarmg under forced draft -the largest t'vei built for marine use to date. Ill is medium assures a minimum of vibration and noise, the absence of which means the maximum ofcomfort 10 the passenger. Proudly the "Morro Castle'' and the "Onentc" speed over a shorter, pleasanter route to Havana, A speed of twenty knurs or more per hour enahlcsthcm to rank along with some of die fastest ships under rhe American flan, and reduces the \\ ard Lines present running time from Hew York to Havana from so enty-rwo to less tlian sixtv hours. This improved service wall be mu in rained throughout the year and will play an important part in the fur tire development of trade between the United States ml Cuba. 111 each Uner luxurious aceommod.. tions arc provided for about 'juo passengers, most of whom are <arried in outside staterooms- Private baths and showers are liberally distributed dm mgliour, Tlie Barnet Phillips (Tailpane and J. Philipfviesecher Associates,interior decorators, are responsible for the design and decoration of tlie passenger cjuartcrs and the public spaces in the two ships. Every requirement for cruising in tropical waters has been met, and the spaces are heated and ventilated from a central source in suring cool or warm air as the weather i lav deuce. While various architectural styles arc made use of in diflerenr rooms, the arrangements and colors 111a ke an agreeable Transition from one space to another, giving the vessels .1 spaciousness suggestive of the large Trans-Atlantic liners. The forward end of the promenade cede is glass enclosed, supplying pro tected space for deck chairs. 'The after end, larger in area, is similarly encased ; ml is fitted up as a deck ball room, where an orchestra furnishes music each night for dancing. Practically funning part of the ball room space is the verandah cafe entirely enclosed by glass casements. A long, unbroken promenade on either side of the deck runs between the ball room and the taie, J *>} /'-v/ i >' PaUf Th h i-. Th. - "fAotro Caste. ' Oo y .n K'-,>nd lli." Uf>.'W? a .(.!. I -i p:-.-!- : ! - a and dct-vr.v-'d wrh dv ICmR fVit'.h.-ii.i ili CMk HU POMTT^^^tz ne m A visual of ih<e Hardy Dam and power house after the work is completed. From a drawing by H, H. Ostrander HARNESSING THE MUSKEGON IN MICHIGAN i jkfrKt the huq/ fnjroiitrfrk T/7/.4 ilifh'J n b/ch is //ear ^;//4r C'MstvffCtior. JLan thar hvo vcars its'ts iin expanw isf set-Grid-prowth nrnhcr perhaps t he must in teres liny ann-Gdion aloi, p die M uskc^ijii River, in Ncwayro kmmiv, Miclnpan. Since then rhe Id Ik i sc a pi- at one place has been complete! v transformed hv A J flee! Inc , a conmu. rifsc concern wbi.k is huikhup m tins n\e-r a hm.,e earth-hank Jam. i ikjucstkmahlv, it: s% tla- Lrasn'f of anv hind in \1 iclnpan I fits wuik, w hit h v. Li s hcLpd; m J:dv Uj-'V' hen'.'4 dojie" f 05" ilk." (-oiisuatGi s i'tmcr Tompanv oi that sf ate an J ,v\ ken conpleted.cvcrvth :nu v. ill he hi readiness to ope rare one of 111c HiiNt edident Iredi'odcvm.: plants in the L cited States. Xatura lb. , ilie people ui w estera Mklnqan are interested in the. projg f. whtcli lias been named after i itairpe I*.. 1 lardy, one of thecounu'v's well known public utilirv organizers. Hundreds of visitors on week da vs and thousands on Sundays ami hold Br J. A . (ILL Via LAND eld vs conic to view the pro press oi the work, trider certain restrictions they are permitted to visit many pans of the operation. ('onsrruction work i.> always an a [traction, and dlls danu when completed^ will he one of per ennir! interest because of its prenr size. It will have an overall leiyqth o: feet- - more than hall a inilea and it will he more than ruo icct 1'iiph: in her. .uofrir Imm the met hoLLom uiits hd1 \ l ast. J liecraw lay rep-ikhicecl on this pape shows the jiuissiu: pr:rpiinji insnf this manmade structure, which will sene both ah a it am a ml also as a link in an important hipl'iwav that will cross the river at this \antape point. The lake ih\\> created will he n:ore than a mile toe-.'Ufi'l 't :: dl-M'ifj -iv err:: w.Rl, rhh-\rki-on;- or iW Cjn both rvirted *. ov/iy -inai5: >' > will Ly i :?l Lit L:ttlf $ Pa(,P- FfHJH 3DU JPONTJfiaga'z.ino across nt the widest place, with a shore line forty miles lamp A R \ii.r o \ii Sr -r Is Bnu A i the beginning of th Ls project it w*,is necessary to construct a ninem lie mil mad spur am nee ting with the Pere-Marquette Railway so that equipment, materials and supplies might Ih * moved to the site of the da in. Other tracks were built where needed, and torn out after i her had served their purpose, so that alto gether approximately thirty miles of rail line were laid down Jo con structing the spur, which runs through heavily wooded timber, tons of du Pont dynamite were used to clear the right oi way and remove stumps after the trees had been cut in the areas to he inundated. You will appreciate the magnitude of this task better when you learn that the reser voir basin stretches up rhe river a distance of about eighteen miles. fhar tins spur line has proved its usefulness will he apparent from the iaei that the contractors have already transported more than 1,400 carloads of material and equipment over this snore but busy line* Ten locomotives and fifty steel dump ears, equipped ^-'ich air brakes and air-operated un loading devices, are required to meet t ran s porta t i on 1 iced s. Tin.; Co n c r e t e Co r f . W'a u The Hardy Dam, with its concrete and steel reinforced core, is built on and sealed over a seed cut-off wall th at extends sixty feet into the hoi clay of the river bottom, 'ill is wall of steel sheet piling senes for anchorage and also to prevent any seepage of water or the burrowing or ground animals under the structure. The concrete core wall is of con siderable width at the bottom, but tapers toward the top where it is only two or three leet wide. It extends throughout die entire length of the dam anil might be termed its "back honed ' Close packed against this wall on both sides are the earth hanks wh;ch constitute the main body oi the dam, the outlines of which are irkbeated on the cross-section draw ing Some idea of this enormous pile of earth in ay he gained when yon consider that the dam has a bottom width of more than 800 feer ami that approximately 1485,000 tuba yards of filling material are required to build the structure to the highway level. Hy d r a u l ic Pa c k in o Although a large part of this hil is made bv damping earth from trains operating on trestles, all of it is packed in place by hydraulic methods whkh bring to inhid the equipment used by pl:ucr miners in Alaska rears ago whet: thousands of them rushed to ihe i\. Inn dike to slake out d aims anti eventually to equip their workings with, water power to facilitate min ing. They washed great quantities uf pay dirr from the hillsides through troughs, the better ro separate from it the precious pa 1 rides of yellow metal. Bur the analogy ends there, tor in tli is case sluicing is resorted to merely as a means of constructing the cm bank merit so that it will be tree from voids through which the water might penetrate. Some of the dirr :s actually transferred by sluicing out the huge bunk on the side of the dam and conveying the muddy water through a ;ong sheet-iron trough to the point where the dirt is depositee. A. large quantity of water is required for these operations and the heavv dcirund is met by two pumping stations equipped with four electri cally driven pumps with a capacity of 1,700 gallons per minute Op e r a t io n s We l l R b o h e a t e d The \v<>rk on th is pro jeet is undcr t lie supers ision of G. C. Willson, cor stmetion superinrendenr, who keeps in close touch with all operations. Each one is properly regulated and synchronized to insure utmost cfhcirmv. In excavating fur the fills, fur example, sufficient trains are kept moving to supply at: uninterrupted Jlow of materials to the place of use. Schedules ure arranged so as not to Pag e Five A view >] onsSr.JCtiOl' cp-.f-juorv,. W-Dl *S.' ai:n:r.i s:.}in'.:a aowmtf^drr.. I#1' rho!0-1nipt v>UL-n List Jut-.- zjfie "DU PONX*stlagetze,ino Gearing ihr: bis;: slab of ibe LnhiK.t-. This vn.:v,,- was phol3raphs:d July J 1, *1930, to show f.onsm.c:ion piogress <. ihal Nob' in ll. dierncK the daw, and also lh.il the py-.v-i hoii-. Iji-girmino in till.;- foim break the regular pate ol i he wurk on ilil 'n c operaiiuns. One nl the iiccompan) mg views si 10\vs the construction of the three conduits, each fourteen rect in dhim u l t . These immense tubes w ill cany water from the reservoir through die earn tii the power house where three turbine generators of 40,000 l. p. capacity wifi Ik * distal led. i he esti mated annual output of this plant, when completed, is 80,000,000 !v i 1 < * watt hours. Huge hurterf y vahes, operated from the gatehouse, will control die water flow to the turbines, the excess finding its nutlet under the wheels into the tailrace. Vi l l a g e f o r Wo r k e r s Because hydroelectric developments arc usually remote from towns and cities, housing accommodations have la be provided for the workers. At the Hardy Dam an industrial village consisting of seventy-one cottages, two staff houses, a hunk house, hospital, general store, barber she3|1 and various other buildings were t instructed and equipped with electric light, running water and a sewage svstem, even though, it was known that these facilities would be needed lesb than two years. Careful attention was given to every detail of sanitation and health. Whi le the timber-clearing operation was in progress, as many as 1,300 lived in this village, and tluring c h ic month iq,uoo meals were served in 'he mess hall. Nmv tln.t the work is well advanced, this have has been reduced to approximately 700 men. Incidentally, in this connection about per cent of the laborers employed in the construction of the 1 lard v Dam are Michigan people. Sc u n i. or Na t u r a l Be a u t v The lake created by th is dans will he opened iu the public for recreational purposes. Fishermen in particular will benefit from the conservation work instituted by the Consumers Power Company, which lias made a practice of planting millions of fish in waters ad jac-ent to its principal hydroelectric developments. When the Hardy Dam is completed and die construction buildings have been removed, this lake and its environs, so readily accessible to die public, evil 1 he a place of great natural beauty. To Simim Up Di:v i-.l o p mk n t From a eniimiercial view point toe edectric power generated at the Hardy Plant will flow through the intercon necting lines of the Consumers Power Company system to accelerate the development mid civic progress of 477 Michigan cities and towns and to render a service to i ,50,000 people. In short, this great dam and power plant, which is scheduled for com pletion in 1931, will stand not only as an impressive monument of steel, brick, earth and concrete to arouse the wonder of passers--by, but it will also be a productive asset of great value to the state. Three conduits, each fourteen feet m di-ameie/, wifi carry water from the reservoir through the dam to the pOwf house, fifty thousand cubic yards of concrete wifi b placed before the Hardy Dam is completed Pa g e Siv <y/ie DU POMT4agevz i n e WALL PAPER IMPROVED hn Dural /. a quality [>:'utluct that looks exactly like firdhh/ry wall paper, but it ix wa shahle By CHARLES UI.P ii vet. am) intlu^n x ha\rcombined Lircxs in pence ling u process olmaL i:i-j wall paper coisi?v washable. Ir is j new and revolutionary development, one that bids iair to exert a marked influence upon thousands o! business enterprises connected with the manti hut tire ami sale ol wall papers, ami one that will bring a new and valu able bench!: to consumer's of these prodin 15. 1 fie curie iuncticui of wall paper was x har oi protection. It supposedly prevented the walk oi homes; tram absorbing damp ami cold, and sc; guarJed the health id those living within. However, its protective prop erties were insuifkicnr to justify its use on that store alone. Later, its possibilities as an art medium came to be recognised and wall papers literally flowered forth in color and design, The an of decoration, though half lost in the post Victorian lighten ul and still in the lad stage, was making ra pulstridexroward adeh sure form n hi. Dccorntui s began to appK wall papers with such artistic discrimination and satisfaction that tlu. sale of wall papers quit kl v came to depend almost entirely upon their decorative ptissi bilities with little regard for other considerations. Xaivraily, a reaction set in. Manx* deemutors began ro clamor for a more permanent, more prank able product wirhnut sacilicing the benurv, color or texture of the paper. Qualkv, of course, could be improved. Color* soini were made to star fast, Hut the one age old weakness remained 1111 remedied wall paper soiled. The walls of iviariv a heaiitilullv decorated room could be quickly niaircil In tlie mere touch of tine, play soiled lingers, ui' stained by the accidental spi I ling of ink, the dripping f grease, or some other household misadventure. I his was the big problem, and its solunon was sought hv rhe tin Porn Company in conjunction w uh the Robert (irifiin Division oi rho ! rsnl Wall Paper Factories, Inc. F.mi ^ cars ui thorough ex peri mem a mm lot lowed, and at length produced Fn-Dural, a washable wall paper. However, neither the do Pom Com pany iii>r the United Wail PujXT Factories, Inc., were willing to an notinec the result until practical deco rators and thdrJistrihutors lunl made thorough test so! itsunique properties. 1 nev tried Fn-Dcral under everv praLtica I condition, testing ear h i la im made tor it, and finally thev were obi ged to proiumuce it a success, A special h n is ft created bv die du Pont Company makes this wall pap:r easily washable with soap and INI Alvw-- -- A '.-/-nc-i -'ll -j room fxsj:i-rvd wish rn Durr, h 1r;oO hi.-,- c.'d'HJi/ w.-jll i. ba du- ur> v>,-'.v ,,j> ih.. finhE rev. -ik i-'. c .'.'-Hkilili- r-U'-T.'-rCi*!'.- A ii;d-- i-u/ij--- rt'id wu-.r eaaiv U-rslur'k'.-' Wh .'iS JAwi; Si-:VKK warm and in no way interferes with its beau tv or decorative qualities. In texture and mush it looks no diJlereni than any other paper. Against the: dull soft: rimsii oi its surface, mam' beautiful designs and colors find tn.e decorative expression- Jr is made in the* convenient 24-inch width and requires no special hanging opera rmns, and its cost conqMres favorable with rhat ol 01 dinarv paper ol file vtfer class. Fri Dural is wasiiable. Severe tests, recently completed m the in Port laboratories, a\e demonstrated the lac tils at even with frequent washings, this specially processed wall paper will wear for rears without the slightest sign of surface marring or tolor fading. Here arc some of the usual disfigurements ordinary soap and water will instantly remove: Ink stains, pen*, d and cravon marks, d'.rr. imger smudges, stains from alcoholic mixtures, tobacco and ginger ale. Even grease marks nun' easily he eliminated, leaning the paper clean, fresh ami mil in paired in any wav. 1 o the home-maker, En-Dural rep resents a dream come true- For the hotel, the club, the hospital, or any semi public building as well as the home, it wil: prose in valuable. The bugaboo of every interior de-coraine scheme soiled walls becomes a tiling of the past and decorari ve main icmuiL'c costs can he cut to almost siuthing. This is particularly applic able to all types of apartment houses where the cost ol re-papering soiled w alls runs to ruinous figures. T:, - m . ..jit:..J.-J .ift^WiXyadb Qfe DU n& BABY BLASTING MACHINES .VLo/i ihitr/Lpr/jj* ft? rii>: r hare keen ha-cJiteJ} aad some fjj them are hr/efi) descv/hvJ here By ARTHUR I.A MOTH:! Ma .v a i.ih , i! vjt 1.1- .'5 <' niw , E.Ki'i.c >s,r vi-x Dio* *.in Mies: r TTiii. hist successful blasting id .i- diincs made in the United Stales weighed about thirty-five pounds and when proper Jr operated would shout thirty electric blasting caps in scries. At tJiat iiinc, 1876, electric firing of Blasts Wits in its infancy, and ic prukiHv never occurred to any one that there would he am use for biasring machines that would hre oih one shot at a time, lor the cap atu! fuse method would do that easily ami cheaply. With the advent of permissible explosives for use in mines Comainiug iiijlaJiiinable gas and dust, electric firing was insisted upon, be cause of its greater safety , and hi ,4 Sling machines of small size a nil luw capac ity were devised having a number of ingenious arrangements for develop ing the current'. Usually they were magnetos; that is, the current was generated hv revolving an armature either bv a spring or gears or hv a string wound around a spoof between the poles of a permanent magnet. Dm' (a j j - Devices 'flic earliest machines of {Jus tope weighed only a little over four pounds aid, with icdinary care, would hc-i set era] wars. I heir cost, however, ilet:wed rhew inrrrvhnTion in .o d mining, especially where the mine's had 1.0 buv their own etjoipmei 11. Th is resulted in u rum her of devices for bring dcctnc blasting caps from the current generated bv one or more dry cells carbon zinc elements, esu ally three connected in scries which gave a sufficient: volume of currcnr and vuhage enough to overcome rhe resistance of the electric blasting cap acres and leading wires. The disadvantage of the earlier types of dry-cell batteries was that they ran down ami became inoperative 111 a surprisingly short time. A blaster never knew' whether a cell would work or mil' until he tried, and 1? failed. Moreover, a number of these, having exposed terminals, were dis tantly unsafe, for when the miner would put one of them in his pocket with two or three electric blasting caps on top, there was always a chance that these would come in contact with the live terminals and expiloJe iu his pocket. \ af iocs de\ ices were i men ted with a view of obviat ing this difficulty spring contacts that closed only when the knobs were pressed down, and eon tacts h i deep recesses, such as are found in drv cells far use with acousticous. AKOi 0:1:11 I)j sa d v a n t a g k (.croon of the pocket blasting ma chines were suspected of giving a current so strong that ilie breaking .if the leading wires at the time of linng might result in an an; rm would ignite explosive gases in the mine; or that a spark might be produced inside the case which would ignite am' explosive gas that had entered the case from the mine atmos phere, blow up the machine and ini Hare a mine explosion. This fear led to the development of permissible pocket blasting machines hv severe! companies which successfully passed the tests imposed bv the Bureau rf Mines ami received its approval pi ate. Some of these permissible machines functioned so well and had sued: a. long life that inventors developed machines of. similar construction with P.^iL IiKiirf ^ie DU PONT^a^a 2si n.c* ;t rapacity almost equal rest* he original thirty-hole blasting machine of the Centennial, hut very much smaller, lighter and more convenient to use, These were designed with a smaller type of generator than that used in the larger machines, namely a dynamo type, which had electromagnets in stead of permanent magnets. The rotation of the handle spins the armature by means of a train of gears, and the revolving armature picks up current from the residual magnetism in the field magnets and builds it up. This, in turn, iniluences the magnets so strongly that at rhe* end of the stroke a current of high enough voltage is generated to lire ten or sometimes twenty caps. The foregoing briefly sc is fonh the history and to some exrenr rhe basic principles employed in the de velopment of these electric firing devices. At any rate it will serve as a background for a more detailed stiulv of the `'baby" blasting machines comprising a part of the writer's accumulated collection through the years,, In the accomparn ing illustrations. Mo. i is an acousticon drv-ecll hatterr w ith the live terminals at the bottom of recesses in the top, about half an inch below the surface. It is still possible to get accidental contact with these live terminals, a Ithough not likely in the ordinary course of mine blasting. No. i is a dry-cell batterv with spring contact points anti a clip to hold it on the miner's belt. This butterv is operated hv holding the leading wires in contact with the posts and pushing them down simultaneously. Mo, 3 is a permissible dry-cel! buttery with a special contact point which males accidental firing prac tically impossible, but it lias the disad vantage of the comparatively short life of the dry cells, so that one never knows when it h going to dic. Mo. 19, shown at the bottom of this page, is n permissible shot firing dt vice, designed to he carried on the miner's belt. It consists of a storage battery, similar to those furnishing currenr for miners' electric cap lamps, mid is equipped with a special lid vvirh two spring com act points. Press ing these down with two specially- constructed plugs causes a current to flow through the lines connected to them. When properly assembled, this is a fairly sale and dkeient device, hut every now and then miners become impatient at having to use special plugs on tile ends of their leading wire, or they Jose one or both plugs. Then they are likelv to knock rhe top off this battery, leaving exposed terminals which may easily cause accidents. In fact, we have record of one instance where a miner uncoiling an electric blasting cap accidentally brought the cuds of the cap wires in contact with the two terminals of the battery, peppering an unfortunate bystander with copper from the exploding cap. Mo. <] is one of the old magneto machines in which the armature is spun hv pulling violently on a string wound around ihc top, she permanent magnet funning part of die case. No. 5 is a. machine of German extracticm designed on the conven tional type of permanent magnets and gears. Jt is operated by turning a. hancle inserted In the bottom and is good for about three to five caps. Ni>. 6 is an ingenious machine in the form of .in automatic pistol with holes in the muzzle into which the leading wires are inserted. Pressing rhe trigger releases a spring, which must be wound up previously by inserting a key in the back of the machine, which spins the armature. Unfortunately, some nervous miners object to seeing one of these pistols pulled out suddenly and are apt to become irritated and excited. Spring- actuated machines up to the present rime have never been particularly successful In smaii-sizc blasting machines. No. 7 is a magneto-tv }>c machine of the conventional design made hv the Davis Instrument Company of HaItimore, Maryland. No. H is a successful three-shot machine of the conventional magneto tv pc. It has tile usual detachable handle common to this type which enables the blaster to lock fhemach ine hv the simple expedient of taking the handle out and putting it in his pocket. * (.v/.-.wv.vf,/ o j pur/ : P.vii: Min i. <7/}.e 01.7 F3OT^TTo/tar/a-zinc* H : A NEW BOOK HOUSE FOR CHILDREN M/n'fj (<-f //V it mid's inwt /tfiTitrtn'e jut' yu/ft/g paipU: is rot/faimsf iu //>/s iff/rati/rr' set Hr i\U L W. SAMPSON ot'.-r, :n if t-. ri u? a :r. i.i . ;ri:D i m:v.:r iiH'jr--- JS^Lo h j . or a dreamland than e\*er is the new Bonk Hour: for ( ,h i Idren . The ease itself is an .a tirai wooden house, and when y o u look .it it, the asraiigenient of die books somehow suggests a door and two windows leading snvdchi into khrv Lind. Red. blue, veJow uni! i'nsunannif gold are the colors, and jest as rob and color tul are the i outcries. The pages arc wide margined, and ; i large read aide type. Fsecured in 11 ic- imaeiriai ".c ipauner rfiar capri- ales children, there we paters ar.d pages of' dJusr'Mtiijns hv such artist:* as !)onn (Vauc. Msec and Alisha Petersham, Mariet Wilhuite. Kathar.ne Sruapes, Wilfv Porranv, Milo V inter and tellers, all > d whom aie adroit in sfirrmi' children's minds into wond-rh'l \ isions rhat are only for die mc o % i-ina aid \\ id c-wed. I'hmi * he folk a rd wonder I ales < it i!I i he world Uliw Bcauprc Mil Ic? has rakeit die c<l and arranged them in this set. AH the old favorites are there, am: so me new tines, coo. There arc three special volumes, one of the tales rold in die land of tulips and pantaloons, one from France, and the third from mystic Japan, with all tin.'feel in earn! deiicac y id a Japanese water rndor, dark windhent pines against ifit: wliite of Fuji, with die water green bc'ow. .Maud and Mi ska Petersham avru ,'dlv spent diree months m I dolLuid and as mci'iv more in France, sketch ing and gathering material for fhese \ nln nies. H his set is rn.h "Trc isnre ch-esr" for iinv c'l ild. No euungsrei' who comes to if fiur.grv rear a ston will n, j a wav disappointed. .Not in n few words can one reveal u lull coyiirmg of the treasure it hears. It is a spring from wlnJi all children in.iv Jrmk deeply, and Co .some purpose. hi "Little Pictures of Japan"' from i he Book: f louse, for example, Mistime .Apo A .D. ) sings uf 'AV;, telling for AI Id Kj VCSc ' - "Since 1 fa inch- heard Fur away* the first wild goose Give forth his cry, My thoughts have been fixed on 1 v ou the middle of the sky/* This collection can he the hanpv means of fixing i he voimg reader's eves on rhe skv. The set has been completely hound in Jii Pont Fahnkoid, which is water proof, washable, vermin-proof, and duranic. Grimv hands cannot per manenrlv deface the covers,for finger marks wash readilv from f-;?hnkohl I-or full iiifonnatioji write to The Book House for Children, $6o North i\L ic i iga n Bou lev a rd , Adi i ca g o, llbriois. ` >-.r. /[- l-.'fiv .Mil--. -1 . .'i, if'-j P.sf : 1 r.s Vfie DU PON"TMagci'zino An j-.-rui viovv jhow.nc th- j-wrT.p a'M through which O : c:anS tuiv.:f-..;s, btXvwn the Jsuo River .inJ ihe 1 c,l*.i .VCium,} ir.i THE ROLE OF DYNAMITE IN BANANA LAND Tin-, pdncipal banana belt in Hon duras, Fcntral America, lies from ecu co filer mites inland from die shores of dm Caribbean Sea, bordering the principal rivers with h originate in the mountainous inrerior. As the rivers approach die Caribbean the grade flattens pcxccpf ihly, the rivers widen, and large dismal swamps are eiteoimtcml. Drainage of both run-off wafer as we!I as sub-surface water is one of die chief require naans of banana culture, and large sums are annually expended for this purpose- One ol rhe principal developments oJ the timed Fruit Coinpam' in Honduras lias the Toloa Lagoon for its tlrlinage basin. One of the compim A largest canal systems is located in rhe Guavmas District between the Film River and the `fido.i Mountains. An important unit in this system, the (Jmwinas River Diversion Canal, whkh drams into the Tuloii 1 aigoor. was excavated Kcriar/n^ the work of bhistiu^ outlets for *7 ii-'cinhs^e cnncd into ToJon Ljgoon in IlonJ/mts m By K. ROWE , l 'xm:n i:K::ir C.u mp,\,v v ir ioiS with a <u>B Diesel dragline fi?r a dist ante of fe,oao leer - During the heavy rain caul flood pcruxl late in that vear, this canal was practical!}' dosed tor a distance of 4,000 feci on account of rhe volume of silt deposited hv the flood waters o! the tiuavinus Riser. hollowing a recession of the floods dm camii was partialis* re-excavated and at the same time extended farther towards the swamp lor a distance of 4,l .-,o ieel, Iravcrsiijg dense tropual ijmw!h. At this point rhe depth of P.-Ui K Ef.llVI V water was so great as to neccssu rate removing rhe machiiieexcavator, Jack oi suliicicj-t outlet for the water made further operation impossible. I'o prevent the loss oi this canal a second time, it was necessary to utilize some quick method Co obfain the required outlet, and the decision was made to use dynamite for this important work. HIrSling operations were loininrrnccd at the lagoon, and the excaca tion proceeded to the canal already constructed. All labor and supplies, including dynamite, were brought ro the site hv native canoes tor a distance of* approximated}' five miles through a series oi winding channels. A vamp was established on the edge of the lagoon and the dynamite was stored on a large barge. Working conditions were partieu urlv bad. PracticeIIv every class of iunglc laud was encoumewd....from WHERE THE UNITED FRUIT COMPANY HAS DEV DEVELOPED A DRAINAGE CANAL IN HONDURAS cjfie DO JPOMTatiagci35/nc* ACHIEVING THE NEW IHu'turmq ;onc of the popular r;:d^-.nR yjrrrkrO' I ;:?r t-:-. right--the cn>--`D--:cs corf-r. 0 : corvknc type, rh.* r-U iind lV* r,-rki' ii*g hujiSi'Jre .j.nd v.c:L>-in >j;rdk SILHOUETTE Da Punt r///'fnr;.;n/ jnkric.s p/ny an impnruni part in tin1 deialupn/i nr vi fh-: woihrn reJactnfy pnnntnt Ih J:. W. HOTCHKISS L 1 o k :?.iv when rule hv dictators is so wijiimjn ilnoughuut the world, {here k ! Ji'ic wh i >se absi >J e tc Jujm nance goes l.uk :utu Instore tar bevund the Hiumuv ol us moderns; whose dkmtes haw iv.rclv been questioned; whose word is law . 1 his dictator is SrvL*, and from Pans hv govern';, a I HU ssr-fes|N ttk ,il fv.i t times, the read 111 id \v<anai hr wear. \n\ak; his n:a:iv eewees mine has been more arhururv or more start! in g in its changes than rhe one that even I 1 he world a bride over ; v:;,;r igi j , when t l:e mandate went one that hukc!on*b due pras css vlhoman: would he* "lc dernier cri" jr; icmminv Lohion ( )f. V;i! i*se ir applied u> a ;I: ! lie short and ial), die slender an*::! strait. To whose Hi'ures were ada pted ro this rc'v style this charge met. with iustani appmvd. Their less fortunate .s Asters, however, handicapped hv ex cess avoirdupois, faced the serious problem of how to achieve this new silhouette. And so we have witnessed a threat varietv of exfvdients diets, exer cises, reducing apparatus, and a him tired a id onemerbnds anil theories for removing die excess poundage. \mnrrg the ni.uiv methods for gernng rid <>f snrpJus tissue, the one arur practical, because it is natural. has been the use of the new reducing s.orsers made from sjvn;il rubberized fabrics:. The idea is not new, hur the j.'.imn: k s rh cnee Ivi:s arc a rcfincrncnr and improvement ui tile carlrcr ivpc. Reijjcmg torsets were first incnidia ed to the trade about r yx \ . The corset at that time was a pure gum rubber product wirbout fabric of am* kind, and whereas it worked well as far as reducing was concerned, it was net very comfortable to wear. In thc isrst place such rubber was absoJntdv ncii alisorheiH, and the idea of cold rub be!' next to the skin was also dis tasteful ro manv women. After the development of the pure rubber garment, its ei'cciiveuess hav ing been hrmlv estahiislied, ada po tions to make this type of garment more comfortable were made by mb budzers and corset manufacturers. The present -day garment is made of a combined fabric consisting of two special!v knit fabrics cemented togci her with a high-grade rubber compound. -\ feature of this new material is i bar no rubber acnrallv comes in con tael with the skin. These corsets have been used more or less tontinuouslv since u j l s * although the recent princess sifhoueicc ficis Wrong lit then: to the fore ag;ibi stronger rh.m ever as a scicnriiir and practical nk-rhsk! oi reducing. The principle on which this rcdiuing corset works is simple enoughIkeause it is made with rubber and is practical!v airtight, penntrring onh a slight cirt uiaCion of air, it docs nut allow the hodv heat to escape, d'hts Pa :ii For.-:* O/m I>TJ PcONTitof/azf/m produces ;i condition that tends to break down the Lirrv tissues of the body gradually hnr surely. 1 he woman who ueiins lias modem reducing corset Joes not have to go thwmgb :mv set of exercises She sim ply puts it mi and wears it during the dav s routine. \nd rhe exercise of eoing lier urdman- household duties is Mhiidem to produce the desired resmc.s, It can he worn half a dav or note, as may he necessary. because of the natural conforming properties of these combined fabrics, tins garment gives ample support with tfie navi sumn of com! nrt. In fact, the unusual comfort of this corset has fed mane women to wear this rvpe instead of die regular foundation gaiiuensg even though it is primarily recommended for reducing and not for continuous wear. Tile dit Pont rubber plant at Fair field, Connecticut, has been manulac runngrubberized fabrics lor [he iuoc[ trade lor die past sc\en years. Special studv lias been given hv du Pun: chemists to the nur-ulacturc of rub ber zed 1 a Hr ic s psrtccuhrh adapreJ for this work, The selection of fain' cs is (\ocd oi: rhdrdurahiliry anda ppeararice, The rubber, of course. Cues run contain am thing that might prove injurious to the sk m, arid but h the fabrics and the rubber are combinec in a wav rfiat will render them most servicea hie. Ihe Ju Pont line*, as now produced, eliminates all possibility of lowing rubber next to the skin. At first glance the material does not appear to he made of rubber at all. A Liver of it is placed between two knit fabrics, which may be eithc" cotton to cotton, cotton to ravon or cotton to silk. The cotroii fabric is worn next to the skin and is quite absorbent, giving the wearer a high degree ol comfort. MuStuf flic prominent co;`scf manu facturers are now including one nr more of these steles in their present lines. They are made in both unboned and lightly boned models, the most popular of which arc flic corselette, step in and girdle types. Any woman who wants to have a deader figure and who lias nor been so favored by Nature can, by this new method, achieve the desired results. No 1 linger must she forego sweets a r die bridge table or the ni.uiv dedicators that arc so unfriendly to her. The rubber reducing corset will help me;c away the excess tissue with the maxi mum comfort and convenience to the wearer. Tiiesc garments are obtainable at the best corset ic res and dry goods stores throughout the country. TWO NEW LUXURY LINERS L't.'KUcJ fr-./s; /vy : Opening on these promenade spaces are windows of the lounge, smoke room and writing room, gi\ iug ilicir occupants a clear view to the sea over the low bulwarks. Children traveling on the "Morro Castle" or the "Orientc" do not want for recreation facilities. A plav room has been constructed on A Deck which is decorated to resemble a street scene In Spain. It shows at one side: the exierior ol a house with a kinLem lighting the entrance. The other walls depiu landscapes from Mother Goose and nursery rh vines fb>r grown-ups who wish to keep in trim during the ; ovnge there is a modern gymnasium opening on the sports deck. Passengers need not he inconve nienced if they forget Lrsl'-imimfc purchases; both ships offer a number of shops well stocked with necessary articles. A barber shop ami a hair dressing pailor are also included. Access to the vanuus decks is possible hr t w o main stairways and elevators in the forward ami after lobbies, which arc developed in the nio.lcrristrc manner, with beautiful veneered mahogany as the predorm- nat ng wood inlaid with sac in wood and ehonv Spaces dc\ oted to the first - class smoking room and deck entrance lobbies follow the si vie ol the Italian Renaissance. (Aver the center u! the smoke room is an arched semi-circu lar skylight in amber glass of rwo tones. The furnishings in mellow tones id" velvet and hrocafebe have an antique scheme suggestive of the Faber oi the Doges. The lounge, forward of the JP.idsh :p lobbies, is decorated in the Mvle oi Louis XV!. The walls are soft tinted white mahogany, ornamented in an tique gold ixuicls anti moldings. The ceilings, ion, arc pleasing, with deco rative medallions in color A mezza nine,with a wall opening surrounded hv columns and a bronze railing in appropoatcdcLubgiN esan impressive ceding height at the center of the room. The atmosphere and dignity of the saloon of the eighteenth century aie lepiodticeJ here hv authentic details. On D Deck is the dinmg saloon. Like the lounge, it also has a me zombie with a wall opening sup ported hv col i runs of imposing pro portions, ruining through two decks. 'Hiis room has an air of dignity, even [hough il has been given a rather in formal treatment. Hanging at t he end of rhe mom on one ship is an oil painting of die "Morm Castle," while in the same position on the ether is a painting of the "Orteiitc." Then, too, rhe galleys have con plrfc electrical equipment that further enhances rhe already lamous quality ol the Ward Lane cuisines. Special attention has been paid to saictv of Lie at sea. Lack buer carries fen dfe-hoats and two motor-boats, chus assuring accommodations for all on hoard. An electric fire-alarm system is located in a centralized panel in thc pilor houses to indicate the presence of lire in ativ part of the liner, and mane rested safety devices and man; modern navig.umg .ads are provided cn these boars. Tliesc new ships, along wirh others i i rhe* Ward Line licet, are prcieeied and decora red wirh do Pont finishes, i abiding palms, varnishes and eiiani els. Thusdti Pont contributes to the forward progress of the American meivlunr marine. P.soe Fn i rr.v rD.fie, OIJ POIM'TJtiaga'z.inx? THE `'p Practlcallv c<inrinnous expo tion hy President du Pont, a brief sure to low concentrations and short outline of the company's progress DU PONT intermittent exposure to high con and articles about du Pont prod acts. centrations ol methanol cause no MAQAZ1NE Vitii/hf-iJ ,n-:J CuVyri'! h i- DU PONT Dt SKMCt INS X lU, Iv,;f V I Mi\'.'UO.\. I L; AVOn , L. L A apparent harm; hut, on the other hand, continued exposure to high concentrations will cause serious poisoning. "q. AN methanol, whet her made by wood distilhidon methods oi syn THE '"WE" AERO HELMET i . .1 M -..'a II: ,-i . t............................ thetic methods, or whet her n is i'- 1 li . ,i! ' ill.a !.;!. .1. : III I > r i i r. i .1 n. ic - ...1-. c|:j-a. i ii *. ,8 irr:1.'! ,, 111 * | _i*.- .1J >.>>, : 1.-..: I ... " - ;! . K, ,I : ....... - uaide, rclincd or highly purified, is poisonous when taken internallyn It Vm.. \ A V fOBRl v\RV\ 1<M1 will cause serious poisoning, blind N .. > ness, and possibly death when as hide as two ounces is taken into LINCOLN W 1*1 -i i:]u/ p:issing years t he Aiucri - cun people appreciate more and mure the sidling cliurail er of Abraham Lincoln. ills le-;u ersh A d 11 ring one of the most critical periods i.d our nation 5 history and the mspi rational quality of his life as a man and statcNjnau entitle him to a place among the immortals. We do well to honor his memory each year nr :he anniversary ol jus birth. This month's cover il lustra (ion, from a photograph hv R iitase, shows a view of the Lincoln Memorial at Washington, D, C. the stomach. "5. To ;h oid misuse it is recem in c n d c d ihat 1 n the fur ti r c all anti-freeze methanol he brightly Colored to enable garage attendants and the public to identify it as 111e111 aiiol; and to warn against misuse, particularly for beverage purposes. "6. The largest producers of meth anol anti freeze label their containers so as to call attention to the hazards of misuse of methanol and also issue information and instructions to gar age attendants and the consuming public warning against its misuse. It is recommended that these precau tionary measures be adopted by all producers," H r nr is a cap for winter pl;ty that ah boys will go strong for--a snug, one-piece design in real aviator style. Abide of genuine du Pont. Fahrikoid to withstand water, ice, snow ami chringing clinert ic conditions, each "We" helmet is lined with soft warm fleece. There are three styles; One with detachable goggles, and strap and buckle fasteners; another trimmed with a soft pile fabric which can be turned down ru act as a Miielding peak, and still another has the dim strap oi self material. "We" hats arc well made, the edges being neatly bound all around. Color* arc blat k and brown. Furl he * ANTHER EEZE hi HTH A NOL id l s pk i-.a o pub! n it v has breu gn,en ro statements anti opmitais LA REVISTA. DU PONT NivvcoMtR in the field of company information and prices may Ire o|v mined bv writing to the Good Value Hat <N Cap Manufacturing Company, 693 Brnadwav, Mew York Cine decrying the i sc oi methanol as an publications made its jjrst appearance and-freeze, Presuimihlv many motor ists arc wondering whether or not il is safe to use it: their tars. According in January with the distribution of approximately -pooo copies of Rer/ita Da P/jttf, the ofheial export FOR INFERENCE Timim will shortly be available for to experts of the lLuted States Bureau magazine of E. 1, du Pont de Nemours distribution a complete index of all of Mines, who have investigated this A Company, Inc. It is sjxmsored hy du Pont Explosives Service Bulletins product, no hazard exists in its use the Foreign Trade Development Di issued since July, 191.3. Tiic.se monthly as an anti freeze. The following vision of the company and is designed bulletins contain discussions pertain summary of their conclusions ami primarily for c i rcu la lion among ing to the economical and safe use of rccumijiciula! ions is quoted from du Pont dealers, distributors ami explosives and blasting accessories, "Information Circular Kn. Lei s '" customers in Spain, Portugal and all as determined by the company's stall "i - Ohservanons made by Lie Larin American Conn Lries. It is printed of technical representatives. Bureau of Mines have tnd mated in Spanish ami Portuguese, and will The index is arranged chronologi that there is no danger of poisoning be issued quarterly. cal! v and also according to classes ol I rum the reasonable use of methanol The initial number contains sixteen work, such as coal mining, metal as an a mi-freeze for automobile pages a.nd cover oi the same size us mining, cpuurrving and the like. It rad i a tors. 77, D;` Pont Mni'iiziin. 1 he front cover will serve as a readv reference aid to l . 1 he evidence that methanol portrays a colorful illustration of thosewho keep a file oi these bulletins. poison mg has been caused bv a bs< p - R1 Chimborazo, one of the famous Copies luav be obtained by writing 10 turn through the Mein is rare and mountain peaks of South America. the du Pont Advertising Department inconclusive. Editorial features include an introduc at Wilmington. Delaware. S] JfTFFNI tjfie DU WAMAM ON THE MIDWESTERN FRONT This striking picture was taken by a Chicago Tribune staff photographer near Riverside, Illinois, where officials of theDespJaines Valley Mosquito Abatement District started ditch-bUsting operations last year to drain low-lying areas where mosquitoes have Iona held control. This end view of a shot made with du Pont ditching dynamite, is most unusual in that it shows how the Material is thrown away from the ditch a g e Se v e n t ee n LUJ TO ~ -in'.: l.-.r W/v rod-, of ti;i 1-Y;n; rpu-' r\. h:s-" h-i for irr.ri.-, -ir<; :-;c. 4 11` .- / ,H - IT Jf i -.n .if n. r; K. v- Ye.*, t *; - z ino interna Tuna lie smart private* 1 irnr< fi. consuler this new rexture basically correct, practical and exceedingly charming. 1 hew use it: in formal onlooker fashions or they tailor it scvctvly for specialized sportswear. I lowcvcr rrenred, spun rayon fabrics, from their verv softness and dullne-.s, preserve dm t not cud' fciriiriinitv which is so desirable todav. DU PONT SPUN RAYON /hi cutrrily miv knttl vf n/jv,i is if*a/ tv m/kc the /f.,tdiu?.y ,\\'uvr.\ jjhvic far / / By !' C. (IA R RI MYiTOM rayoij Libms, u mth arc ^ cry dinerenf from oilier ravimy arc pLv~ iii 12 a prominent part hi the Fain: Be;- 111 i i] lections of women s apparel. Ill esc new fabrics have a soft "U-Ats " ked somewhat iike woo.. In appear,mcc rime resemble line sheer \o >olciw. In fact, dies- have the! ashion appeal of woo] with tfie coolness of r.rvou. f hex nre i. Weed nglv snip pleasant next to die skin, anil rhyv '-Aasb \V311 no more rf a:i ordinary i.irc. I hey are Mamie m texture and p? actually uncrushaMe. They retain [liear whitene^ under :\W conditions - a pome of special importance in a season when white \s so much to t he fore-. Ihcv ace seen in all the most desirable fabric cheers open-work iaconnts. basket weaves, rough slum rung and serge-like rex Hires - in white, pastels and smart printed designs. J!icse cloths, made ui du Pont spun ray on, arc being fas burned into resort wear dresses hv a urea?: ninny of the ic.ieiing dress houses in this country. The fact that one Fifth A \ euiie shop sow on? its jirst shipment m a lew hours, prior to aov advertising and witijour a complete color range, is an inlicarioj of their fashion appeal. i>i;t u t u . Sp u n s o r s iiip In Paris, spun ravens are a notable paa of all important sportswear col lections. Couturiers entenng to an Wh.w Is Sp u n K a y o n ? Jr is radically different from other well-known, wdl-establ fsbed ra\ ons, a diiiererce nor so much in rhe wear mg as in the- inherent charaelertscics of thi s new r\'pe of yarn. Up to row nearly all rayon yarns have Teen inaiiiifacttired in the form ui t.onttmious threads, hundreds of yards tong. When woven or knitted into fabrics, they present a very smooth surface and a beautiful sheen, bright or somewhat subdued as style or taste dirtntes. The new varn, du Pom spun revory is hist made in continuous thread form, then cut inm lengths of from one to six indies, and finally spun together a gum in much the-same wav as wool or any other srapk fiber is treated. The* fabrics woven or knitted from this varn have practh ally no luster whatever, and instead of he ng smooth, they are fashionahh rough m texture. Tim Du Pont Rayon fionipam* is the only coikeni in America making rbis ry pc of fiber, h is die result of a great deal ol research and experiment in the du Pont laboratories. Technical and style authorities agree that spun rayon will grow in importance and that its usefulness will spread to many fielJa. Pa g o Fir.ii'RK me mj W^GfH'Taiiagomine FINE FOR SMART HOMES AND APARTMENTS "Fold-Aunty" dining sets Stive floor sptice ly ttti/ieing u\il! space ,Bv JOH \* H. C.Ain'HR. L apartments or homes where, spate is ar a premium, "hnilr-in" features have become so populai l I.at eon tractors and builders consider them as$tam.iarda|Uf pment when planning, building or remodeling these struc tures, Tuan already long list of stub space-savers as huik-in cupboards, bookcases, radios am! ironing-boards has now been added a unique dining set which is adapted especially for apartmenr use. It is called the "Fold Aw:ivM and is maiudacrurcd be ihe Fain Folding Funutate Company ui" Norfolk, \ irginia. Rl.QClKl.S LiliU*. Si*Act*. When not in use, French doors cleverly conceal the unit, which con sists of two benches with hacks ami a tabic, The ` 'Fold A wav ` ` unir is available in cither cabinet or recess type in a number of styles suitable for kitchen, dining alcove or living-room use, Tlie ''Windsor" style requires a space of only live Jeer, two inches ins;!: In' three feet, eight and one-half inches wide ami ills in either a fourmdi Mud well car on die surface of the nail- The table top, measuring twenty-nine inches by fom -Seven indies, and the benches, forty inches In' eleven and one-half inches, giveample room lor four persons to he served cunilorrabh*. W hen the meal is tivcr and the table cleared, the entire scr foies qnicrlv and easily hack our of the \y ;o % the table into its own compartment and the benches on hinges to either side oj the doors. Sa v e s Tiio u b l l fn many apartments a sepur,He din ing alcove is not provided, which necessitates re-arranging the living room every rime a meal is served, Thai bother is eliminated be the Fain emir, for all one has to do is to open rlic French doors, release a eateh and lower the table into place. The housewife finds that a ' FufciA\v;iv" in the kite lien saves much P\ca< NiSfo tEN time and many steps in serving bin ned meals, break lasts or midnight Mucks. And eating [here is more plcuomu and mote vom cujcni, ting lot idler dm meal there are no extra chairs to he earned to the li\mg mum or to interfere with cleaning operations. a Iu ic -o v er; die bain unit H exrrriiiv ly handy as a sewing cable vi kitchen work table. Incidentally, this arrangement eliminates the breakfast alcove and saves the home owner iron: ,S}oo to 400. If one so desires, the doors cm he fitted with curtains to give die uni: r:ie appearance of a built-in china cupboard. The trestle table and benches are s: 1 ird 1 ly constructed or guiinvooJ which is finished with a lustrous coat of walnut du Pom Duco. Another Fain unit, the Told-Ovhitic/' fits admirably under anv window thar is three and one-ha I: feet Irom the floor to the top of the window sill. This model is siauiich!v built of white pine throughout in a most pleasing design and is extreme! \ smart when finished in blue, greet or in a Duco color that will blend with the cedin' scheme oi the room. Other kitchen models have tabic tops trade ui pon eh in. He Fom living roan unit folded c w j y in the wi;- <J/ie I3U POMTvii<?ri2?!iiP WHEN THE MOUTH BEGINS TO WATER }{)')<! pve>Jactx thi t-'*xih/e Ltlloplun}v packages tnauiatv th: ^appetite Bv Ik W ROB BIN'S J_ nv have often heard the ex presyon, "If makes m\- mouth witter " But dul urn c u t realize char it N actual/,- iruct The sighl ot uppenzifig Inodstuli* pn>diuc n just that effect. J-.xperi rnems be a \vc:i-fcnown food prod tie is manufacturer were con ducted ruTTiu'r with some amazing results. -\ delicate apparatus attached to a rubber tube was pumed in the month of a person who agreed to submit co a test, and then different objects were placed before his eves to Jet c rminc i. o nip,; t a ti ve j y the physiological reaction. h>r die hr.st ex'pen mem a black and white illustration of food was held up to view, with the result that* the aprwruruh recorded a slight de gree ol mouth watering. Next, a beautiful four-color illus tration of the same product tv as hivmghr nur anil exhibited h lurrher stimulated ilie snhvarv glands. I inallv, when the actua. food was shown. [lie mouthwatering clivet was almost start I mg. Th is test proves that nothing louses one's appetite as the sight oJ the food product itself, It clear I v demonstrates the basic reason under lying t!ie visible merchandising of foodstuffs in glass containers, or wrapped in Cellophane, or prepared for market in such a manner as to pennit lull viesv of every appetizing cct:hi ur the food itself. Alice Hughes, in hew wider!v-read column in the Sen Yvrk makes the follow mg statement which emphasizes the point: `Tn stores nowadays we arc asked to accept verv little on faith. The contours of food packages are no longer a matter of hopeful spot illation. We sec them before we buy them. C.ellopjiane is a n a tc race i ve u torch and i sc %v i ndow through which people want to buy goods because they look good/ When acortain food product "looks good" to us, our mouth actually waters, and we buy it impulsively bo anSc we wa it to cat it either right away or later on. NTo wonder more and more food products oNered in stores today arc sibihlv packed. The public has been hoLh the judge and the fury to whom the manufacturer has submitted his case. And the verdict lias been ren dered in favor oi visible packing. Thai is the wav people like to buy foodstuffs and pro-visions, and manu facturers have been quick to note it. (jranting that "the proof of the pudding is in the eating/' a revised version or the old saying is no less true "The proof of the buying h in the seeing/' Pa c h : Tw i-n 't - Vfic IDU PO^T^ac/az? 77 o PUTT WITH PYRALIN Air yon a miniature golf fan- Thai yon will ho inhmtal w clubs with .u mitan ?yips made of this materia! Srrlcor .icif coiin.*. y< h th;; olfcr U:n -r i;si:n.rt5i. Anu w-1..-r. you .tr< proc.d.-e wjth f;*jt:crr dio,i- shown t'_ ioA. 11,nuiii., h .ill :ln- r;oic onjoyoirl^ w,it h By R. F. BLANCHARD 2.6,000 courses scattered A ul Pyralin has a part in it. for over the l.Yiitcd Scutes, miniature golf the `Sanitary Pyratonc" grip is made :s m> longer in its infancy. It has em irelv oi this material, which is Jcached the adolescent stage and is suflicicntlv tiiin to vidd easily to the still growing. Irs possibilities uf'ev- handsand tu he pleasing to the roach. punHoi! seem tiiilunited. Taking these Also, to assist the pLocr in gripping facts into consideration, flic Pynimne and aligning the Huh, tile handles Products Corporation of Cdmago has as c as aiLilile in round, pentagonal, produced a new putter especially heptagona! and octagonal shapes. aca|weal lor* rids gamc- Tltese putters are pricrual for pub lic use because they arc sanitary and Hearable. Pyr.ilin docs out: absorb perspiration, nor docs it a I ford a surface to collect germs from die hands. 'Thus it meets the health regu- latnns of manv municipalities. In Los Angeles, for example, where approximately e,ooo golf courses are located, a recent ordinance recjnires each Huh to heerenliYed before it can lx: used bv mother pi aver. In another city rhegrie must he recovered with a new paper wrapper after each round. With such rmes in force the popular ity of the new porter seems assort'd. A v.clicn c! :hv PyrP.n<-.ovslniH. Nhw -.he sin-!! in ii'k'S.oprri over the solid aluminum rod. Ai tin: four cornrrs ire slown vsnc\if-Ouncs. Ihf' hmdies K-in- sutjfdii-ci -ft colors Pa *;i: Iwt.N f t -On k The shaft is a solid aluminum tempered read, and the sleeve nr grip is telescoped over it and secured at both ends, as siown by the accom panying drawing. The Pvratone Products Ccuporaiuoii may also he credited with introducing IVralin in numerous patented acces sories for the game, among them a torsional grip and an ingenious ferrule construction which eliminates the annoring "string wind" at the base of the shaft. <Jfie 330 PONT^if/azme On A UNIQUE PYRALIN MIRROR W,,,, rhc new A11-\ i:c mirror, so aptly dexurihed by its n;ime, vnu reed no longer guess ar votir appear ance- just look in it and see yourself as othcis Sue y o u from every direr run, front, side and back. The device h constructed with two facing mirrors joined together with a hinge on a handle char is conveniently grasped. When manipulated by am idler person behind you, hill reflections of vmirsclf from all angles are visible. In design?fig this mirror, a strung marena! was needed for the hacking of each glass, Pyralin was chosen because it Idled every requirement lor ilnrabil rtv and vet ad Jed a note of at traces veiies.-y because of rhc soft pearls and glowing colors in which it is mailable. The A ll-Yue mirror is now made in many beautiful Pyralin pearl color effects to harmonize with the general color scheme of the hots doir, shop or salon, nr to lit in wirk some particular boudoir set. When dosed, the device forms an attractive dressing table article*, protected from dust, scratches and breakage. Iieautv and mnlincryshops heartih endorse die AH-Yue. Dentists have found its use an asset, and theatrical folks consider it a great aid in their make-up work. for further information, write to die A lb View Mirror Company, Inc., 11 West gid Street, New York Citv, DUCO GETS AN ENCORE A.w uinTanc dial Inn* down 150,00'' miles over all parts ul lher lrnited State:,, Mexico, Canada and Central America is entitled ro a certain dis tinction mi that count alone. The II F. Goodrich Rubber Company's plane, ` Miss Sil vert own,' ' has nut only covered rhartbsraixc, but during t he peri nil it has been piloted bv I .ee Sliocnliair, this shin has also annexed .seven world's records for speed and ha:, eeen used in wnuus parts of . America on many interesting missions of one kind or another. It was die airplane selected to carry the iirsr morion pictures of the Byrd Am arctic Expedition 1mm the Canal Zone to New ^ ork; ir carried Whig Commander Khigsfurd-Sniith and his parry across the Uniced States alter d:cir flight from fhitdaml to America, aud it is regarded as flic fastest cabin cruiser airplane m existence. It was hissfi ami Imishcd with du Pont Dui:o at the Lockheed factory in Cal if o!-nia, and we are told that the iinish has stood the test of a quarter of a million miles of travel remarkably well. Ad vice Irani A kron indicates that the ship is now being refirished with the same du Foot materials. Thus a good product, having proved its worth on this famous plane, gets another chance m duplicate ins service record. Lf,: XhocnhaM-, pilot <snd tK--' pUrv livr hss flown S'SC.GQO miles Pa g -j Tw k v t y -Tw o OS'Je ID1J PONT^apn z: / ne FOR CONTRACT BRIDGE SCORES a h l f , not vulnerable, doub let] . undoubled st) if is and so it will he throughout chewinicr. For contract bridge has now taken its seat in the CO T RAC T D RIOGE \ t-to.eAt-Cvi-crot> flBMflMjppjpggm: ............................................................................- ^11 --M * i- S|^A:|g M9M' wM|B Nolc: tK.: inrur discs of Pvrsfin w-iich may b: iol:i>-d to odd th-> iCO f< from. fm\ of ihe social theater; and it is there to star. As ore leading expert recently said: "Few people realize how widely contract bridge is p!aved tod.re. The popularity of this game is spreading internarion,d!v. and so lasr that 1 have liiid to add five secretaries to inv sralf to answer die inquiries that are swamping mv oil ice dailv/ Quick co realize this fact, Mrs, Gohd Brubakeriii Los Angeles, Cali fornia. has dev Led contract bridge calculator made of du Pom Pvralin. flcc.mse this product is his toms and beautiful if; all its shapes a:ul forms, and because ir is available in an ini in ire variety of colors and thus, Pvralin is the ideal nuuerial from w hich an advertising and merchan dising novelf v such as this can he made. Mrs. Brubaker, the tnvencor. has arranged to have the Emeloid (iom.\!iiv oi Aihnglom New Jct*se\ , manufacture this article and handle its sale. Hie contract bridge calculator is of simple construction. Two white cir cular Pyrnliu discs bearing the various numbers and scoring tigit res used in 11 is card game are covered with two other pieces of Pvr.ifm in a variety of beautiful pearl eJiecr colors. These inner discs may be rotated easily, moling the score instantly. The dev ice eliminates inaccuracies in scoring and helps to keep one's mind on the game, For additional information about the K-B contract bridge calculator, write ro the EmeloiJ Company, Inc., A lingnan. New Jersey. CONTRACT BRIDGE K-B. CAlCUt ATOW ITAfthS | >,. ........................................ t ns\ \ # * Si 47 57' w This rOviC' clf-( ki-i`f end d.>nb,-r THE ROLE OF DYNAMITE IN BANANA LAND \iy-Hiituc. J ' marshes to heavy virgin forests. All trees within ten feet of the center line of the canal were felled bv dynamite and axe, and later were thrown free of the right of way by the regular ditching charge. The largest tree encountered, a f'ejha free twenty-six leer in diameter at the base, was felled hv a charge of one hundred and hi tv pounds of G.vikplcU.d ard m service ouHei cf the carni! j : To'oi L-j'i-'vn dynamite. During the ditch-blasting operation this enormous tree was thrown a distance of ninety feet from the ienter line of the excavation. Special tools such as punch bars, loading tubes, and the like were designed locally as required. The regular loading charge for excavation per lineal foot was eight and two-thirds pounds of fifty per cent du Pom: ditching dynamite. A ditch carving from two hundred and seventy cubic yards to twel ve hundred and seventy cubic yards per one hundred lineal feet was secured widi an average of six hundred and thirtv cubic yards per one hundred lineal feet. This excavation w a s obtained in an area covered with water to a maximum depth, of two feet in (daces. Sixty tons of dynamite were used to excavate i lineal iect of ditch wirh a cubic vardage of 98,7^6 cubic yards averaging approximately %.i cubic yards pei lineal foot. A weighted average of the work accomplished indica test hat onepou nd of Jifry per cent dynamite will move approximately one cubic vard at earth. `Phis figure will vary, however. P aj ; h Twv.v iv -Th a ivH according to the class of soil, amount of water present and character of woodland. The great advantage in chc use of A closer view of ih.r tnEhed ditch a iiHc ortho upih- ime dvnamite for canal excavation, is the saving of time and the ease with which ditches are constructed in aicas where no means other than the use of a floating dredge can be employed. Work on this project was started [ii.v 1, 192.9, and it was completed October 7, 192.9. cj/ie DU PONT^'o^azi nf- l:XPLOSlVlr..S.... :\ C ! \' 11.1X1' \Cl FORf.f: i. f.i scinati ng and * I r.i t i *_ w.svs, even ft ?r work on large estates and in the laving nut of golf courses so rfi.il explosive language is the J.jgicul -e.suJr, k on see, of the acnial ox|dosiws used in .To; ring those hjteiii! hazards. Ir his h in?* Keen known that i revs planted in flows excavated hv high exphesi ves seem [o rhrive heller than f ho.-sc planted i j i holes dug In a shovel. Tight subsoil is broken up hv the lorec of rile explosion gn mg the voting roots a ^ ha nee to grow, and making femE/ation far inure e'ievtive. In the South, jiiostpiito-contn d work has beer carried out stress lu firu iifi dvnamlre not hv blowing up tdu: hugs i hemsd es, let me hasten to add, hut hv draining stagnant warer areas where thev breed, hv means oi [slowing out. long ditches through which the water muv I low. I fere is ;i weird new job that explo sives are doing. Fhcv arc being used o> explore the earth's ulterior. \\ hen a small charge is fired m a shallow fi de_ \ihranunnl waves are sent our in all dirwrinns, just as was es radiate from a pebble mown h iu u the quiet water if a p.nef lb' means <7 verv Jcliwiii' efaukd dm is es these sound w;i res win he charted and measured -.v.cr wide areas. The stria lure of the earth at considershie depths can thus he determined. A long our ti n If < .oast, for example, there often occur - deep in the earth) masses of rock pair several acres in extent. 1 or reasons which geedogisrs can explain. oil and sulphur often occur in curb mien on with these salt domes. Favorable areas I >i drilling are Uk ated w i i h this a mazing method, cm pi-wing explosives. In this war our national wrah h has already been increased hv ni.my millions of dollars. Sa i--u s R u o r d s Sicr 1 know diat most id vui. have been murimming n > '.-ourselves: *' IVel I, that may he a lovdv. helpful industry bur none of it lor me*' But, ;:.s a matter of fact, in no American indus try are more widespread and successful aborts made in the interests of safety lor die simple reason that they* have to be. For the pas: three years, half .i hdhun mns of ex olosi ves have been transported ;innualbe over the railwavs oi rite United States and ( anada without ;mv loss of life ami with no Joss or damage so Fir as commcrcia I explosives are conccrnedAnd Sii wv havr this fascinating. vn.il industry. Ju the interest of safer: .... die i ruled St a tew Bureau of Mines eerciucs certain ivpes ol Juia mhc as lacing permissible lor use hi geese and Juste coal mines, having passed rigid prescribed tests, ibis is an important contribution to the safety of American miners, Explo sives manufacturers are conducting a muiun-wide campaign to reduce the mimhe' of accidents to children as ;i a sit It of placing with blasting caps. "Safety first'* obviously must be. am: is, die guiding principle of the explosives iridi.srno BABA' BLASTING MAC! i 1NITS frxiK J-, C_: No. <) is .number ingenious design which is operated by turning the handle in die icrow at the tup, thus winding up a spring and, at the end of tin: wind, autoimukallv relcasing it and firing the charge. This magneto m.uhine is permissible, hut lor suinc cason it: did not take very well with the trade. No. io is one of the first ten-shot porker blasting machines put on the market. It has larger permanent magleTshiir dm l |c ih :im I design is t ho saun as the regular three-hok inachirie- \u. . S h. an experiment.: 1 machine .nude hv rhe Da \ is 'Instrument C miwnw, j nd is designed to shoot ten holes. It is of the dynamo tv pc, having el erfromagnets No. i r is ;-m Austrian machine w iit h had beem snbjet red to eon sidvrahlc rough usage in the mine. It is still in working condition, how ever, a {though about fifteen vears old. No. ii is die first of the clcarom.igneuc generators ard L supposed to be good for ten or hftcen caps, but was ue'er pm on the market in this country for die "casoii that it was tou strong lor single shut Jiriug and not strong enough to assure bring ten or lit teen holes at j time. No. i } is one of the most successful of modern pocket blasting machines built on the Jvnamo-geuerator type, and, while rated at ten holes, has [seen known to fire as manv as rwentyTvm fr is made In rhe Fidel in Electric Cum pans- of Lam aster, Penn - l\ ania. ami is put up i:i an attractive amiuimmi ease, ft also has die safere feature of a detachable handle. No. 14 is rhe smallest and hn$t expensise of the magneto-logic genet atorx. It is designed hv* the Da\ is Instrument (Company and is perm is sihle. Ir comes nearest to the ideal cope for shot bring in coal mines because the i urretu is gcHC"ateil grad j.ilb*, so that ii more than one cap is coimecred, the more sensitive cup will not explode. Firing more ih;n: one shot at a li me in gaseous or Jus! \ mines is prohibited in many stares. It has an ingenious binding post attachtncnf, an invention of Mr. Waldo Wilson of the du Pont Com puny. No. i% is n du Pont permissible machine whn. h some ingenious inmei th-onght to nuke Jouhlv safe by filing oh rhe contact points am! soldering special contacts for a sliurt-cuvcmug i able Cornua tiori. No. 16 is ihe standard du Punt permissible blast ng machine with the standard contact points set on a !iher insulating; plate to prevent con taci between the bare ends of the w;rcs and the ease, ft is a magneto type generator nf especially long life, mounted m a ve-v substantial case ui a -J.C entire! s. ol !iea\-\' brass. Fikr rhe oilier perusissi Ide inacli incsshi.wri it has a detachable handle and an insulation inside the case in guard against* accidental tiring of a cap from contact bet ween the cap wires and rhe rase. In addincm , irs it ing handle is insulated to prevent the possibility of a spark's shooting out through the kev terminal and also ut prevent a-..erdenta; firing from con tact between cap wi?*es and the kev. No. 17 is a permissible blasting machine of rhe Davis Instrument (.ompany, with orass top nod bottom and nickel-plated sides. I> Crf . 1 "w ent r v fiii:ii i E. I. DU PONT DE NEMOURS & CO., Inc. General Executive Offices, WILMINGTON, DELAWARE All Inquiries Regarding du Pont Products Should Be Addressed to the Company--the Nearest Office ACIDS, HEAVY CHEMICALS, AQUA AMMONIA, DRY COLORS, ZINC OXIDE AND OTHER PIGMENTS Grasselli Chemical Company, Inc. Chemicals for leather, textile, paper, paint, rubber, battery, glass, sheet, tin plate, steel and petroleum manufacturers. Lithoponc, dry colors, pigments. Chemically pure acids, electrolyte, filter alum, spray products for fruit trees, vegetables and flowers, silicate of soda, soldering fluxes, zinc, zinc chloride. Birmingham, Ala., 2000 First Avenue. North Boston, Mass., SO Federal Street Brooklyn, N. Y., 152 Morgan Avenue Charlotte, N. C., 930 W. Morehead Street Chicago, 111., 2101 Canalport Avenue Cincinnati, Ohio, 305 Walnut Street Cleveland, Ohio, 620 Euclid Avenue Detroit, Mich., 1530 E. Hancock Avenue Los Angeles, Calif. Dry Colors & Pigments,*2034 Bay Street Chemicals, 363 New High Street Milwaukee, Wis., 1503 West Canal Street Newark, N. J., 256 Vandorpool Street New Haven, Conn.. 46 River Street New Orleans. La., 1140 So. Robertson Avenue New York, N. Y. District Sales Office, 347 Madison Avenue Export Office, 347 Madison Avenue Paterson, N. .1., 6 Waite Street Philadelphia, Pa., 3500 Gray's Ferry Road Pittsburgh, Pa., 307 Fifth Avenue Rensselaer, N. Y., 34 Riverside Avenue San Francisco, Calif. Dry Colors & Pigments, 274 Brannon Street Chemicals, 576 Mission Street St. Louis, Mo., 408 Pine Street St. Paul, Minn., 2303 Hampden Avenue LITHOPONE Grasselli Chemical Company, Inc. (See offices listed abore) Krebs Pigment & Chemical Co., Inc. Newport, Del. Cleveland, Ohio, 424 Ilickox Building New York, N. Y., 217 Broadway ANHYDROUS AMMONIA, ANTI-FREEZE METHANOL AND METHANOL l)u Pont Ammonia Corporation Methanol and anhydrous ammonia in lank cars. Anti-Freeze Methanol in lank cars and drums. Wilmington, Del., Du Pont Building AQUA AND ANHYDROUS AMMONIA National Ammonia Company, Inc. Anhydrous ammonia in cylinders. Aqua ammonia in drums and tank cars. Chicago, III., 332 So. Michigan Boulevard Los Angeles, Calif., 316 Commercial Street New York, N. Y., 11 Park Place Philadelphia, Pa.. Frankford P. O. San Francisco, Calif., 77 Minna Street Seattle, Wash.. 2224 Northlake Avenue St. Louis, Mo., 3600 N. Broadway AUTOMOTIVE FINISHES Duco and a complete line of finishing materials for all automotive purposes. No. 7 Duco Polish, No. 7 Auto Top Finish. No. 7 Nickel Polish, No. 7 Touch-up Black, No. 7 Super-Lustre Cream, No. 7 RadiatorCleaner. Chicago, III., 2100 Elston Avenue Detroit, Mich., General Motors Building Flint, Mich. Parlin, N. J. San Francisco, Calif., 351 California Street INDUSTRIAL FINISHES Duco, Duco Household Cement, bronze powders, collodion, leather belling cements, leather finishes, nitrocellulose and cellulose acetate and their solu tions, Du-lux synthetic resins, pyroxylin prepara tions and solvents and a complete line of finishing materials for all industrial purposes. Boston. Mass,, Everett Station 49 Chicago. 111.. 2100 Elston Avenue New York, N. Y., 21 East 40th Street Parlin, N. J. San Francisco, Calif., 351 California*Street CELLOPHANE l)iiVont Cellophane Company, Inc. Cellophane--Sheets and rolls. Cellulose raps and hands (formerly Capes-Viscose, Inc.). Visking Cello-Tubing (Visking Casings). New York, N. Y. Executive and General Sales Offices, 2 Park Avenue District Sides Office, 145 Hudson Street Boston. Mass., Little Building 80 Boy Eton Street Chicago, 111., Conway Building 111 West Washington Street Philadelphia, Pa., Liberty Tru^t Building Broad and Arch Streets San Francisco, Calif., 351 California Street DYESTUFFS Dyestuffs and dyestuff intermediates. Rubber chemicals. Boston, Mass., 140 Federal Street Charlotte, N. G., 232 \V. First Street Chicago, 111., 7 So. Dearborn Street New York, N. Y., 8 Thomas Street Philadelphia, Pa., 1 26 S. Front Street Providence, R. I., 709 Hospital Trust Bldg. San Francisco, Calif., 351 California Street SEED DISINFECTANTS Bayer-Semesan Company, Inc. New York, N. Y., 105 Hudson Street MOTION PICTURE FILM Positive and Negative. Du Pont-Pathe Film Manufacturing Corp. New York City, 35 West 45th Street Hollywood, Calif., 6656 Santa Monica Blvd. EXPLOSIVES Explosives for all industrial, agricultural, military and sporting uses. Birmingham, Ala., 601 Brown-Marx Bldg. Minefield, W. Va., 607 Commercial Bank Bldg. Boston, Mass., Room 404 Charles Chauncy Building, 38 Chauncy Street Chicago, 111., 1814 McCormick Building Cleveland, Ohio, 766 Union Trust Building Denver, Colo., Midland Savings Building 17tli and Glenarni Streets Duluth, Minn., Hartley Building 742 E. Superior Street Huntington, W. Va., Suite 1004 Union Bank Building Joplin. Mo., 816 Joplin Nat'l Bank Building Juneau, Alaska, Room 503 Goldstein Building Kansas City, Mo., 902 Midland Building Miami, Florida, 120 N. E. First Street New York, N. Y., Graybar Building 420 Lexington Avenue Pittsburgh, Pa., Clark Building Seventh Street and Liberty Avenue Portland, Ore., American Bank Building Pottsville, Pa., 516 Schuylkill Trust Company Building Sr. Louis, Mo., 1182 Arcade Building San Francisco, Calif., 351 California Street Seattle, Wash., Hoge Building id Avenue and Cherry Street Scranton, Pa., 701 First Nat l Bank Bldg. 207 Wyoming Avenue Spokane. Wash.. 721-22 Old Nat'l Bank Bldg. Riverside Avenue and Stevens Street Springfield, 111., 716 Reisch Building Wilkes-Barre, Pa., Brooks Building FABRIKOID Fabrikoid for auto and furniture, upholstery auto lopping, bookbinding, luggage, novelties, etc. Tontine Washable Window Shade Cloth. Chicago, 111. Fabrikoid Office, 2100 Elston Avenue, _\ I ontana Street Stat ion Tontine Office. 1411 So. Michigan Avenue Detroit, Mich., 5-236 General Motors Bldg. Newburgh, N. Y. New York, N. Y., 21 East 40th Street San Francisco, Calif., 351 California Street RUBBER PRODUCTS Pontop for auto tops and curtains. Raincoat fabrics. Rug Anchor, Vcntube fur mine ventila tion. All kinds of rubberproofing. Chicago, 111., 2100 Elston Avenue, Montana Street Station Detroit, Mich., 5-236 General Motors Bldg. Fairfield, Conn. New York, N. Y., 21 East 40th Street San Francisco, Calif., 351 California Street RAYON Du Pont Rayon Company, Inc. Viscose Process Department New York, N. Y., 2 Park Avenue Charlotte, N. G., fill Johnston Building Chattanooga,'Penn., 609-611 Provident Bldg. Philadelphia. Pa., 1505 Land Title Building Providence, R. L. `Ml Hospital Trust Bldg. San Francisco, Calif., 351 California Street Acele Department New York, N. Y., 2 Park Avenue 40 Worth Street Waynesboro, Va. PAINTS, VARNISHES, DUCO (FOR HOME USE) A complete line of paint and varnish products for all home and industrial uses. Boston, Mass.. Everett Station 49 Brooklyn, N. Y. Building No. 26. Bush Terminal Chicago, III., 2100 Elston Avenue Cleveland, Ohio, 791 Union Trust Bldg. New York. N. Y.. 21 1*7. 40th Street Philadelphia, Pa., 1616 Walnut Street San Francisco, Calif., 351 California Street PYRALIN, LUCITE AND VISCOLOID Lucite, Pyralin and Arlton Boudoir Accessories. Toys, rattles, combs, gift articles, infants' sets, manicure sets, hair ornaments. Novelty and transparent sheeting, rods, tubes and beading. Also cleanable collars. Factories at Arlington, N. J., and Leo minster, Mass. l)u Pont Viscoloid Company, Inc. New York, N. Y,, 330' Fifth Avenue Boston, Mass., Room 404 Charles Chauncy Building. 38 Chauncy Street Chicago, HI., North American Building San Francisco, Calif., 745 Mission Street FOREIGN OFFICES (To which inquiries about du Pont products may be addressed) Bombay, India, Jacob Sassoon Building Rampart Row, l*. "O. Box No. 1010 Buenos Aires, Argentine Republic Foreign Trade Development Office Av. Roque Saenz Pena 616 (Casilla 490) Hankow, China, No. 23 Tung Ting Road Havana, Cuba, 548 Edificio Manzana de Gomez Kobe, Japan, No. 83 Kyomachi (P. O. Box No. 384) London. W. C. 2, England, Bush House, Aldwvch Mexico City, Mexico, Edificio Cidosa Avenida Uruguay 55 (Office of Du Pont Rayon Company of Mexico, S. A. ) Paris, France. Paris Development Office, (> Rue Christophe-Colomb Shanghai, China, Robert Dollar Building 3 Canton Road (P. O. Box No. 393) Tientsin, China, 52 Taku Road When you are in Atlantic City, New Jersey, visit the du Pont Products Exhibit at 1121 Boardwalk The Cocoanut's Package Calls for X-ray Eyes But Anyone Can See Du Pont Cellophane, man is able to protect things perfectly and still leave them visible. What Is Cellophane is made from the purest form Wrapped in of vegetable matter in the world. As a wrap Cellophane ping it protects against all kinds of dust and dirt. It keeps tilings fresh. Yet you can see all it covers just as if there was no wrapping THE cocoanut goes the limit on protec tion, but it fails to show the world what at all. No guessing wliat's inside the package. No misrepresentation. No disappointment. it lias inside. Those who use Cellophane show you what they have to sell. Every day, in all the stores, you will see more and more things dressed in sparkling While Nature's packages are perfect for Cellophane. You can buy them with the their purpose, inventive man has discovered assurance that they will be just as good as how to wrap his own packages as well as, il they look. Du Pont Cellophane Co., Inc., not better than. Nature herself. By means of 2 Park Avenue, New York City. PRINTED IN U. S. A.