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Omeet the exacting de mands of industry, ex plosives must be uniform in quality and in action. Complete control by du Pont chemical engineers from raw material to fin ished product enables du Pont to manufacture ex plosives to a standard of unvarying quality. With any explosive bear ing the du Pont Oval trade mark you are always as sured of uniform quality and action. This trade mark is your warranty of superior blasting results at lower cost. E. I. DU PONT DE NEMOURS & CO., Inc. Explosives Department WILMINGTON DELAWARE <fltFP0RD Du Pont chemical engineers in- sure uniformity of quality by chemical control through crcry step of manufacture from raw material to finishedproduct Branch Offices. Birmingham . Ala. Boston . . Mass. Buffalo . . N. Y. . .Chicago . . 111 Denver . . Colo. Duluth . . Minn. El Paso . . Tex. Huntington . W. Va. Joplin . . . . Mo. Kansas City . Mo. Mexico City . Mex. Miami . . ., Fla. New York . N. Y. Pittsburgh . . Pa. Portland . . Ore. St. Louis . .. Mo. San Francisco Calif. Scranton . . Pa. Seattle . . Wash. Spokane . . Wash. Springfield . . 111. Du Pont Products Exhibit Atlantic City, N. J. - TI.IE MAGAZINE (lupoi) V,LX1X a ix u s t , mi: Nm. * The Dueo Period in Furniture Design is the distinguishing feature of period fiumiHre, l>ut the new Dueo Period furniture is identified also by its finish () the i'e\e men who Bv MATT DKXXIXC: skill ciml ingenuity in designing com pu re-base furni bination pieces. Even today combined ture, "period" means lit tie or noth secretaries and bookcase's are faithfully modeled after ing. To a woman it is the first considera Ids works. As an evidence ot ,t greater ami greater i rend tion, Hie design of the piece or suite she toward simplicity, the Hurd choice of c... buys must harmonize ^ilh the exterior fun hi are buyers in design seems lo be 'wi n Amuchair with cuhr'mlti lays and interior of !lie house, must lit In with the draperies, and inns! he a <*0111 plenumI. to the funnt ure is 1 other rooms. It is only natural, I here tore, that period or design W illia.ni ami Mary. This period is read ily identified by the style oi the leg*, which are either helled al the top, oc tagonal t a penal, or have a cabriole, or m -i,i should play a most important part in the buying of "bent knee," with a collar below. Queen furniture. Anne, another popular period today*. i 'Today, as can readily he seen in any of the store* con also has the cabriole leg, but is usually ducting August furniture sales, a number of periods are popular. I ndoubtedly, I he American Colonial is by far the first without the collar or ring d AV?r England below, which charnel erizes Calimini chair of William ;md Mary. Also in scroll design choice of the public. Included in the Colonial William and Alary, lhe type of foot is an period arc "ladder-buck " chairs, Windsor identifying part of the design. This detail 1$ ('hairs, four-poster )>eds--carved or imcnrved, either a. '`bind* hurt, a "pear" foot, a "cup" with or without I he canopy. The carved bed fool, or a "hell" foot. In authentic William '"a* u product of the Virginias. The 1 hitch and Mary reproductions the piece of wood were responsible for the ladder-buck chair. New .England produced the M indsor chair, Ahiirimn Cahmini ran fant'-jHt.-tii r hai the spinel, desk with spiral carved legs, and connecting the four legs of a. fable -- called the "stretcher ' is u.suuliy a curved X-sIi&pe wiih a iinlal in the center that looks like a the .scroll designs. Dunmm Phyfewu* the leading furni chess piece. Queen Anne period features the cabriole or ture designer of the Colonial period and the best repro leg somewhat similar in shape to the boweti front legs ductions today closely follow his originals. of a. bull dog. After Colonial, Sheraton furniture perhaps enjoys Other periods also have identifying features that are most popular favor. The outstanding feat lire* of Shera readily recognized, Iteppelvhite is noted for the un ton design are a restrained combination of sinipliidly usual shapes of the chair bucks. These arc generally and ornamentation. Sheraton chair buck designs are shield shaped, frequentlv with a rounded top. although 'caddy recognizable |.<> I lie initiate. The top rail of he also produced backs in the form of hearts, ovals.and Sheraton chairs usually is broken by some ornament. so on. IIh tables and sideboards, unlike lhose of Shera Hie legs may be four-square, round fluted or round, ton, usually have concave coiners. belled and fluted. Sheraton side table* usually have con (duppe-alalc is often called the "Master Designer." vex corners. This designer is particularly noted for his {Ctmthiued an pay* ji>) THE DU PONT'MAGAZINE Argentina's Cement Industry Iii 1915 j >o j iiaml ecu lent production amounted to only 25.000 Parrels a year. Now the Cue Argentina <le CcnienLo Port kind h shipping more than 60.000 barrels every month OHT1I AMERICAN raplhd mid By T. li DOHEMI S 1 radons on the next page shows u l.V|l management are responsible fur ieal bias! in whieli uO.CUO tons of rork one of' lhe important imln.stries established in were brought down wit h .`]J j tons of dynamite. A rgrntiua since the World War. The ph.nl of I he ( in. The manufacture of cement is only one of the many Argeid ina de ( emenlo Portland al Sierra.' Rayas. i wo act i v ii ies which are under I he dlreellon of .Mr. Jib S. hundred miles south of Bucuo.s Aires, is one of I ho hesl- Morgan, the vice-president of the (la. Argentina in ot nipped and most modern eemeni plaids in I he world. Buenos Aires. All hough the company was organized In Argeiduiux ccmenl industry is unique in iliaf ii ron- maimlaeiiire cement, llie local ion of ibs factory requires oimcs (o a great extent Argent ine raw materials, uses it to undertake the operation of many services which native labor, arid its product is iwed mostly for home would he supplied by others if tlie plant were closer to eiiiisniupi inti in 1 he development of the count ry. a more 1 hickly populated district. The company main- The plaid, and quarry occupy over JOB acorn ami !hr tain.s a lown>ite for ils cttiph>yees. a colony of work factory is rip lipped with die latest type of machinery. men's 1 louses for ils laborers, a store, a bakery, a bos- The daily out put Is 10,000 >aeks of finished produr!. pital, a dairy, a .school, a hotel, a farm, an electric light (Mustruelion of the factory was completed in 1 TO8 plant. an ice plant, and a waterworks. and I In* company bfgali shipping eemoni in H'JT in The employees and heir families are lumped in well locating at. Sierra^ Rayas, the company took the factory built, modern and comfortable eof Lmres, winch are fitted 0, t ht raw material indeed of hiking lie raw malerial with big open fireplaces, elec! rie lights, liol mailing to the factory. The plant is surrounded for aenw by water, and modern bathrooms. The renting and rare of fcrliL land undfir whieh lie', a AO-fool deposit ol 1 iij !<'- thro* cottages, a> well a> of the workmen'* houses, re stone. Lime eons! j{ ides 77 per eeid of the chemical cam quire the r-ompniiy n undertake t lie *tiit ies of 1 mth lamb lent of purtland cement. The limestone is quarried with lord ami real estate agent. A comfortable hotel fur me die aid of explosives, and dti Pont dynamite is used married men b also inainlained. There is also a fine exehoivolv on thb operation. After the overburden of clubhouse where weekly dances and entertainments, are soil ha< I M'en removed by si ripping, holes are bored given. I weiitydive feel from I he bier* of the quar y with a-im-h It was found to he cheaper and more eonvenien! i> drills, These holes, in a straight row, are ho rial grow vegetables llutn to ship lhem from Buenos Aires; through (heenl ire dop! h of t hehQ-foot. Hjiiestoiicdepnsit. so n small farm lias lieen established In supply vegm The shots a re fired I >y dee! nc cm rent. (hie of on r ilhis* tallies for I he company's cm plovers, Twenty fine IleJ- TII l*i I> V V O X V M A G A Z I N K stein row> pmvide nil l In* milk needed in tin- ruinnmniiy, and I lie bakery supplies fresh hi rad every day. When the factory begun work live years the company undertook to operate n school for the hi mi lies of its employees and put. up a. fine concrete .structure. That this .school might he available to all the diihhvn of the di.sl riel, the building was eventually presented to 1 he province of Buenos Aire.-., vdiidi nmv .-uppheis Hie ess, which makes il am `eojinniicnl to haul la rye quanti ties of llie raw material >n far. A hand of cement in Argent ilia u eighs ] 70 kilos, mid one ion {'HUH) kilos), of raw material produces only three hands,or 510 kilos.nf cement. Therefore, six hand* of cement can he shipped to Buesio.s Aires at. Hie same cost that would he required fur shipping the raw malaria! for i hive barrels. A.s the i "in. Argentina i]e IVmenfo Portland is mn\ -hipping uvertilUKNI hamdsofeeriK nt every inert h, this expense is a very impusvaiu item. The prevention of wa-te b one of the ,, important pros den is ;u nuidem iii- dnslr\, and the latest achievement in tin* cement industry is the devdopmeni <if ! he waste heal boiler fen utilizing waste leal- Unit.formerly disappeared! 11rough the Mir si nek. At the beau of cadi kiln ii high dliire iicy provides \ lie draft necessary for ob taining efficient burning in the kiln; hut Above--This shed, which -urns haded with 7JXX>-pounds of du Port dynamite, brougMdomi 3QjQ0Q tom of limestone Might --The shovel digs in after ike Mad Bekrw--Employees and ojfiewh of the puny anr grouped m front of one of ike Mg titm. Each hln weighs 500 tons ami revolves once m minute teachers and also operates the school. The Erst question.'that comes to the i iiind of a person when told the situation of the cement factory is, 'why was it located so far from Buenos Aires, since the fuel lias to be hauled to the plant and the cement n Mh SMH hoH p, \tr huuleil l>;ir-k r Thoansw erls found in Hie fad. ' Jutl. half I In- ruck and diiy Hml goes into n cement plan I disappears ii! ihe form of gas during the burning pmr- cliuaney as formerly, they arc nowled off under the waste heat hoder in the power house. At Sierras Bayns this waste heat supplies 85 percent of the steam required by the big power plant, N"early everything that moves at the Sierras Bayas plant is propelled by electricity w hieh is supplied by the com- ....... . pauy's own peAver plant, on# of Hie most modern in the coun try. Si cam developed fniin Ihe waste heat id two 800horse power boilers drives three l nrh.s t m bines which in- pnijt If) TIIE DU PC) XT M A G A 7,1 X E A Modern Rubberizing Plant Where ihe sin Ponl Company, with iijs-hMlate equipment and strict chemical control. maniifas:-1ores numv hinds of rubberised fabrics HE history of rubber, hs <3 is - iiv ivr. n . MrumviTZ FntrficiiJ Rubber Uompaiiy* which we Tcowry and development. is so fuscinut iny that one is always Tcriir.ii';;] Si::,*.. T-rWi- M Ciau! I'. I, <.a Ib.r.t do X: Cc<,, hu:. succeeded in this business* was one of the oldest operators in I he industry. It. templed lo refer Ut ;l in any article isri rubber, Tisina' lso a fact that mil il very retvnl iy we were engaged utlfixabim nf rubber for prnleetjve clothing dales baulcmkost exclusively in the niarndachire of niblwri/ed "carriage clot ltd' millions of \ ards of vhieli have been made annually for automobile lops, buggy lops, etc. More recently an intensive ell'orf has been made to diversify the products of our Fairfield plan I by equip ping ourselves lo develop and supply a. satisfactory rubben/.ext fabric of any description which calls for vuleanie.a! ion either by dry heal or by llie sulfur chloride process. In addition, a now department for the jnaimfaet lire of various types of sheet rubber has been installed mul is now turning out sheet rubber produets on a large production scale. The sueeesd'ul nianularl me of rubberized fabrics requires* in addition lo skilled on tern tors, uniform essenlial materials, modern equipment, ami the strictest type of chemical eontroL All of our essential imilerials are sampled and lested before they are used. Specifiedions a re drawn for all materials wherever feasible, and pur chases are made in aerordanre with them. Material in process is very carefully lested during I he various singes of maun fuel ure further lo insure uniformity. hi /A#a' r.dih'T nru`U(ij muehhie fJit* mhhrr cum pound in kunuUd hi*ri\i\ -Jin l foils rnmhng af dyTerr/U .ypeob- Tin finished product is subjected to admit and aecet- mumrei s of years, The Indians in South American jimmies, ( `lihines ago, made wnlerproof fabrics by impregnal ini* them wiLli latex, I he milky sap of the rubber plant, ll is interesting lo uoit:* however, that in I lie early days of its discovery by I lie white man rubber was used most ly to make play I fangs and curios, and that inti, until almost U rev hundred years after tlie white man discovered it ft;ts it improved sufficientjy to make it a. subs!e i of real commercial value. This improvement Wiii based upon i 'harlcs Uoodyeiir s discovery, in J<SbD, of l he pi`feess cf ViilciUiizatioin The propelh of the rubber iiKlii' i ry has lvc.*en Iremen trsus si nee dial day. The industry is si ill in il s infancy and present < sirli Interesting opportunities llnd. it is attracting many of tlie great maids of flic country. A ltlnm.Li.li the du Font Uoinpuny has, at Fairfield* i himicclii ui, mie of Ihi* largest and most modcmly equipped rubber proofing plants in Ibis count ry, the average iiimi does not n.isoeiate the name du Foul wills rubber as instine! ivefy as hr* does with many at her prodiH'is the company inaiiufncl ores, This is b'cause w e have been niniRikicturing rubberized produets as f 1 irdu Pont < -uisifiany for only a lew years, at f hough the (h> f t`i* tiiK /niti !}.>/ a t.ifht (hi /: ;;;vi w i.fn shvf ta or vuU Wem/ upon u fubriii hast-' mnh'riul TIIE DU PONT MAGAZINE ernted aging it*sis. We shall not. at Ito go iulo u arc" used for e;image cloth arc1 mixed in large infernal detaiied deseripl ion of tin* tests made on llie finished mixing maeliiiieswhieli are capable1 of mixing 900 pounds product. Sunlight and heat-aging tests are considered each per hour. The temperature and time of mixing of greatest importance. Other tests which are conducted these compounds are very carefully controlled by auto regularly are tensile and tearing strength, combining matic recording device*. Our colored compounds a re strength, effect of ultra violet light (accelerated sun mixed on steel roll mills such as shown in the lirsl illus light. test}, oxygen ah- tration. These mills sorpl am (nccelera fed consist of two polished storage aging), hydro** steel rolls miming at stal le or w;iIerproof different speeds. On test. anchorage of film these mills, corset to fa brie, uni fori: lily of compound, bright color, weight and colored apron com luster, and resist a nee pounds, white eom- to abrasion. At some pound, and others are other Lime we hope to mixed* present, mi-article de scribing hi detail our methods of testing the finished products. After mixing, the compounds are all strained through very fine screens which re In addition 1o plant, move all the dirt and control and plant, foreign particles that research, our labora may have been incor tory is constantly de porated in the com veloping new types of pound during the mix mate rial based on our ing*. The strained own ideas nr replies!* compounds are then from our customers. sheeted out and per We feel that, this type1 mitted to "reMi" for of service is invaluable, twenty-four hours so and we urge our cus that the rubber will set tomers to preset]:. their and give a more uni problems to us. form finished product. n ic equipment re The compound is rpiired to manufacture then ready to be made rubber!zed muterinIs is into sheet rubber prod fairly well stand The A applied hi the irmojh at the Jeattl of ihh machine, At ihe nor ucts or calendered on ardized, In describing the varnished -muterin! isfestooned ami passes info the pulwnizintj opens to fabrics. This work our manufaet uring isdoneon cithern three process, wc will try to adhere to the order in which the or four-roll calender. Our phi in if equipped with both material flows through the plan!. As stated above, all types. A picture of l lie four-roll type is shown on page 4. essential mat ('rials received at the plant are carefully This machine consists of Four steel rolls carefully Sampled and submit ted to 0111 >j weilieaf ion tests. The ground. They are approximately til inches in width hi brio are given a preliininary inspection for uniformity and 24 inches in diameter, and are steam heated. of weave, color, width, weight and yardage. During tins Before feeding the calender with the compound, il is inspection the fabric is picked by hand to remove knots soft cued and warmed up on I Ik 4 mixing mills. It is then and loose threads, it is then brushed, rolled evenly and fed into t he calender lh Oween l lie upper two rolls. These the semns sewed in preparation for spreading or calen sheet i he rubber out on to the second roll from which it dering. The brusher removes lint which may cause n passe* on to the third ml]. Bel wixm l he second and gi'eal deal of imperfect material. third roll a sheet of compound is likewise placed to pre The prepunil ion of tin' rubber compounds is of tit most, vent, calender skips. lids, i-Ogelher with improved con unportauee. In order lo turn out the best type of niate- trol of weight and gauge, is the advantage of the fourrj;d. Ibis operation must be as near fool-proof as pos roll calender u\w tin: l.hrce-rnll. The fabric is passed sible. Kneh ingredient has a definite function to perform iulo the calender he!ween the two bottom rolls and the rt,|d omissions or subslHut ion* are ordinarily easily rubber film translVrred to the fabric. delated. The bat dies are weighed on precision M idi's Starch or a quick drying tarnish that dries five from whirls an; cheeked periodically, The compiHinds are tackiness is applied as the fabric leaves I he calender. mixed in either of iwo ways, Black compounds such us (('tmlhiuril vti page /") t h e m: f o n t ma g a z i n e Two Unique Loud Speakers We supplement the pictures on this page with a brief description of the new Puratoa.ii speakers--made in part of Pyralin VERY t>}K* who is in lores! ed in E radio knows that no mailer how t/swelhm! a radio receiver may f><\ lb L. Ik STICFd.K appreeiate its beauty, one must see the console itself. These unique loud speakers are made a high-grade loud speaker is needed lo and guaranteed lo give satisfaction by iawm.- perfect sound reproduction. We tlie Timfeioid Company, Incorporated, tee! certain, therefore, that ! lie who selected Pyralin for this use not I honsunds ol Du Pont Magazine read tjii.y because if is attractive in an out ore many of tlnuii will be interested in standing way, but also because it was ! xvsi unif jue speakers lhal have recently found I o insure tin? reproduction of been pul Oil lIn* market, belter lone qualities than any other i>;ie ol" lhem is in J he form of art nl - material. ' - I.rue: or amber colored vw-w \\ litcli c;iii Wf`i) the CiLsleloitl Company first be placed on lop of the radio sel. It. exhibited these loud speakers at the -I uiids a I H>ii i four! era imlies high, ami radio show held a few months ago in i> made of Pyndhi, ln.^1 cifiillV decorated llidbi! el 1 Vi i nsyiva i ii; i* New Y ork O ly in black. ( -nueeahd within l he !>a 4t\ we all {he radio ant Lent ies who listened in me loliL is a high-grade reproducing were very favorably impressed. The unit that produces a very Ihu* quality unique appearance of the loud speakers if lime. The Pyralin side"- of t lie vase never failed lo aftracl attention. We tiinr a lone-anil whieli serves lo sol ten are informed that a large number were i fie sou rid, Hind mi f mg 1 lie metafile ring sold a f lhal I ime, and l hat the company I hei many people dm! object mnahjo in looks fora si rung demand for them dur mud speakers made of ot her inaterinls. ing Ute coming season. 'This vnse-spraker sells for Si t.UU, More detailed infc srmatloii mill gladly The oilier type re a miniatureconsole, be forwarded to any who may be Inter- about (ifteesi inches lone; by six inches 1 ri _rl i - ft re made hi two eolor elleets eiJ^r- J a ilh U<n'k il* esled. Dealers who desire to handle these products in their territory are also on:1, ill a rich shell Pyralin; 1 lie other, in inviIi*iI to write for full particulars. All a! 1 motive rod mahogany colored Pyradiolin -the mate inquiries should be addressed lo Lhe Custeloid ( kunpanv, rial widely user] in making radio panels. The s Jh *I1 Imw Ozone Park. Lang Island. X. Y. ` Pyralin model eontaius the same reproducing unit as is & + Mt used in the vase speaker, and retails for Si0.00. The Pyralin re used in the mmmfaelure of thousands of J'yradiolin model, whieli is said lo he equipped with an products, and the long list coni imies to expand. You exceptionally high-grade reproducing unit, sells for luive learned ih.d Pyr.dhi is well sidled for l.Jic* mami- S2:U!Il. The Pyrn- fael urc of loud lin lone arm is a fea speakers, and that ture of bo!h niodels- itsuse adds malaable Bol h consoles a re qualities to the fin richly deeur.a I ed . is h e cl product. ft o r i I In s f r a l ht u Manufacturers of sUli'ye-d s fill l dor-s other articles may no! disclose 1 he be a III y ol eh a sed surb'U'i'S set nlf bv -old markings, 1 he ai t met 1 ve grille work eoveriiiy i he hell ot i lief one-arm. t lie high-polished Ills! rolls KU rhiee* of inherently beauti ful materials. To And {hr numift1 s-ftmh r is nllnivthu sju'U dfji'oiHi nr rril nUihinpuuj as!nntl j`ijriuliiffhi find that It can be used with equal advantage i11 thei r owii products. The Py ralin Research Lab-* oratory at Arling ton. New Jersey, will be glad to work with any manufac turer who desires to give Pyralin a frkik To Irrigate 70,000 Acres The Tietms Dam in \Ya*hiiigto*n tlic Jhglie&t of its kind in the world* ha* been Imilt. Approximately >160.000 pounds of explosives wore used on the job X .him- 17. 1002, Use late Presi Hr W. STANT HIUKU) was in progress. Willi I Ids era I in view O dent llonseyrti signed a hill creating the V. >. Rec tarnation Service and a tunnel driven uinpleU'Iy around I he west end of t lie dam site. This I timid is HI had high, 22 feet wide raid 2,120 IVct long, and MK-cessl'ulh making it possible to bring under eiiUivat ion a Vii handled :he flow of the river during must ruction opera- acreage of arid lands throughout the West. tinus. It was also built so I hat. with suitable gale con One of Hie 11h is I .successful undertakings of the Rec trol, it eouhl lie used as I he om hd for I he reservoir. lamation Service is the irrignt ion plan in Yakima The dam itself is of the earth a ml rock fill type with a Oounly, Washington, known as lhe Yakima Project. eooeride eoj-ewall extending longitudinally through if Work on I his job, which \\a* begun in 1000, eontem- from solid bedrock io the ercst and keyed into the solid pisiles the iiltiinale irrigation of 500,00(1 aeres, The Uiree rock at I he base. In I he river channel t he bedrock was oidts first completed and in operation supplied wider overlaid with ninety feet of porous material carrying lor I ho irrigation of approximately 225,000 arms. The considerable water. The excavation of this material for loiirOi mill, known as lhe Tieion Reservoir, \\ns eom- I he eons! met ton of ! he lu\uw section of the eorewall jdeled within the past few mouths. It is sri muted on Ihr prcsenteil tin interestisig engineering problem. llefoii River, ;d. Rimroek. Washing! on. aboul 20 miles If open treneli methods were,1 used, it would he neces Iroin Xaelii/,, the nearest railroad point; from where all sary to open up a stip|>iiivswereliaule<l considerable area of X* t ho work by trench, and in the motor truck* Work event, of f 1 ood li l |j ] * unit w a s wait*rs o \t rtoppi ng moumvnrsxl in 1917 the cofferdam* the bti l wa s d iseou - sa iid a it d gra ve 1 lhiia>diiiJiim%191S, moved by the water Iv-eausr of war con w o u I d fill t h e ditions. and was not treneli. The prob burned until April, lem was solved by Since t ha 1. sinking s 1; a f t s I line const met ion tliHHigh the porous material into the fiedruck at inter iv<mt forward rapidly until the job was eumpleteiL val> of 150 IVci idong the lin<> of I he eorvwall. From A11 er building a road to the silo of the dar- I lie first these shafts drifts of the necessary width were driven thing done was: lo make provision for taking cam of the {J'iHltli) /ml an /'fg/*' if) diverted waters of I he Tie!on River while emist met ion i Views of [he Con8true.lion o;f.: Tiolon .Dam......Pari, <>t^ ( Below--Three needle vcdve& -- two 60-inch und one 'MJ^-inch control ikeflowfront the resermir [ 4 Great Irrigation Project in the State of Washington t h ic j > u r o x t m a c a z i x f The Rise of Rayon Tills fast-growing you nosier in the textile family is changing the dress habits of nation*- O B KI) in rim*ti 1 s oi' cost ly silk'5 Jtv S. L. .iOUXSTOX Tims with an apparently unlimited R . . . "Embellished witJi delicate carvings of ivory." These hvu phrases arc close market, for products possessing the distiueiive ami ut tractive quail! ies of silk and ivory. it is linked with age-old i radii ions of dress rnd ornamenta not surprising that chemists, years ago, sought to make tion nml snvor of I lx* courts of kings and pot eiitaT.e.s. silk-like and ivory-like ma tennis in unlimited qi mill itits. l iny have succeeded beyond Iheir exportations. Start ikirt'rjfcupe Hosiery,mm2s 4a 30 ing on I to make real ivory and real silk, they produeed oilier materials so similar in appearance to ivory and silk Ilia! for many years liny were widely known as art i- A'm i' J9J2 ms f?iU- 1012 v im Jieial ivory and arlilieial silk--both misnomers. Ivory Pyralin U n<it ivory, artificially made; rather, it. is Pyralin made Io look like ivory, and so faithfully does il reproduce the color, grain, luster and ol her pn>pe plies ami qualities of I lie natural prodiie! that for all rm Chiton ms - me. fjnavn/eur DP-3 Bmid DIP 1923 Percentage of Total Consumption ofKayon m the U.S.byCses. IT 1912. vs. 1923 practical purposes H is he! ter than ivory il self. Similarly, Rayon, formerly known as art if ini a 1 silk, is no! silk, nr!diemlly produced, but is a product, in a. class of its own. Rayon is a vegetable fiber as opposed to silk, I be animal filler. Jf is a synthetic fiber, no! a natural one. Yet. in beauty, texture ami `'feel" it is com parable only wil h silk, and for many purp< isos it is be Her ! ban cocoon silk. ffpkJs&ry l**1 Goad-'-i DPS Rofh Ivory Pyralin and Rayon are made from cel lulose, a component of all vegd able life. So long as i here mis Plash ms alx* growing things those products ean be made at rela tively low cost and in such quant it ies as may be needed. Pfoul 1912 19.2 That is why a it iele.s uj Pyralin and garments of Ravoil arc1 within the price range of everyone. The parallel has Ik 'c ii drawn in point out tin* fact Ilia! Jensons d ps Rayon, like Pyralin, while firs I eoneeived as a subs! i I ate for a natural pro*luet, lias developed a real market for itself, hut. not at ! he expense of real silk. Indeed. Rayon has actually stimulated the market for wool, cotton For ,dlk and ivory were oneo tin* symbols of wealth, easle and distinct ion. In one sense they still are. Hut modern civilization has upset many a tradition. rVIenfiiie progress and modern Indus! ry have so changed i he externa I evidences at disl inel inn I ha t he ('nloiuTs and silk, f Is use in eonihinal ion with these textiles lias brought, about uu isual effects and color combinations in textiles that, otherwise would riot have1 been possible. ft is natural that the Urn led Si utes should be I he largest consumer of Rayon. Our middle class and even lady ami -hah O'Grady are not only sislei.s "under the skiiu" hid they look alike, dress alike and the average PS 3 man eaimot tell one from the oilier. One doesn't have to he "horn to !he purple'" these days to possess the silken garment or to enjoy t he allure ol ivory, tor silk rail lure has grown info a great industry wil.h an enormous output., though there 1ms never been enough silk to go a round. Wore elephu.nl funning praeliruhlr, !hat industry Loo would have developed and Annual Consumption ofEayon in the 11, S. Ivory would he commonplace. lint real ivory is scarce. Only tin* very neh can afford d. Real silk, too, is rela tively scarce. Prodticliun has trailed behind demand for several years. Our country alone could easily con sume f he world's out pul of silk and of Ivorv loo. * to THE I>U PONT MAGAZINE one wage earners, haring <m1c ipled u higher siumlnrd iif living Iban similar classes hi ums! foreign eminlrk**, demand garments hi keeping with it. And the Rayon indust ry has furnished a large share of the muterhd used. IIow this indusl ry lias forged ahead is told by Hie accompanying graphs. Two of Liem show comparatively I he eoiisumpl ion hy uses in percentages ti nr I pounds I nr I he years If) 12 and 1023 and l he third shows the poundage coiisuned iniiiially from 1012 to 1023--a record without parallel indusl ry. Unit in 1012 siiinption was 21 g mil lion pounds; in 1023, llearl% JOmillion pounds, m increase of almost tot 10 per rent. When linyfon was first produced in this cuimIi\v its chief use was in -he manufacture of hosiery, i'ur a I Hint limed had md hi'eii developed sufficiently lo givc the soft ness arid lexfure demanded for p'-aclicnl use hi oilier textile prmauds, loday all lids is eh angled. While it is t me that hosiery 0uimir.-ielurers consumed more than lea limes as much Rayon in 1023 as they did in 1012, I lit* percentage lias knail ly deereused, and other branches of the textile industry are using Hayon in a larger proportion. Our graph reproduced hehm best illustrates what changes have taken place In the use of this textile fiber, and points lo u great advance made in producing a fiber of greater softness, strength ami utility. Analysis of the data shown here* proves that Rayon now enters inti mately into the manu facture of pradically all classes of textiles and has become an accepted part of our daily lives. No synthetic fiber could have won a place among the leading textile ma terials of the world un less it possessed real merit* Rayon Tins gained that eminence. Listed in the order of impor tance, the world's pro duction figures for 1923 show: ,000,000,000 ihs. 2,000,000,000 lbs. , ,. . .97,000,000 lbs. ..... 87,000,000 lbs. While Rav nil is not a leading contender for premier honors, you will note Ihut it Inis already forger! ahead of natural sdk to theextent of ten million pounds. <'onsi dering its accelerated production during the past fwo years, one cannot tlouhl ilia! Rayon wdl sioaddy rise in iinpoilaiH e ii i tin- -e'dile \ rades, lor this product isnvf> tile needs of the day for beautiful, serviceable, reason ably priced garments of all kinds Argentina's Cement Industry {(`atiiinwif jf'im pti'jf .1) re connected to thive General Electric alternating curre|fi generators of 1259 lav, each, These turbugenerators nnolve at I he rate of odOO revolutions a minute wit hout, any noise or vibration and are among the many marvels that arouse I he admiral ion ofvisitorsid tl iC plant. Before American capital gave Argentina one of the most modern cement plants hi the world, only 25,000 mrrelx of cement were being produced in that republic annually. hVoin u million lo a million and a half barrels imported every year. The importance of otubfisha national indusl ry for the uumufaet me of cement .,lV;ijne very apparent in t he last years of l In- war and [0 llie years immediately following the armistice, when 0 was almost impossible lo import cement. bt 1015, Argentina used 1,125,000 barrels of cement, in 19Uk l,050,000, of which all bid 25,000 barrels each \ear was imported. During 1021 the republicV consumption of cement was approximately 2,05d,P0U barrels, of * hieh 7-ltbarrels were iiuiiuifaetured by the Liu. Argentina de < emeulo Port land. The local plant is now producing l wk r as nmeii cement as it was possible to import under war restrict ions, which is sufficient evidence of its economic importance to the country at large. The officers and executives of the ( hi. Argentina do < 'eineuio Portland are 11. Stnirkmami, president; E. S. Morgan, vice-president and general manager; II. i\ Wheaton, assistant manager and purchasing agent; R. A. Hummel, general superintendent; A. T. Hillegass. sales manager; .1. M. Barker, treasurer; J. It. I.elkhiin. assistant treasurer and auditor; (I. Johansson, superin tendent at Sierras Bayas. THE DU PONT MAGAZINE 1 BII In DU PONT PnbUhht'd and copyrighted hy E. I. DU PONT DE NKMOFUS & COMPANY* Inc. SuLscrifiiiim, 5U emit (he year R,, It. 'UKaii-UTKII..................................................................................... i'diit'f Puhlsshrn may rvprint.. will; m`<Rg k JI urlicly^ uid i:!ustralior; oicc-|>L t';.rryir,, epiUal t:opyri;ht- Electrotype* Will, w Im-ii po*i?i >U, fo furnish?<i on rnrii:o;i. Vni. n ix . Arc;nsT. 1025 No. h to use Hie rigid, kind of dynamite as it is for the car penter lu select the right kind of saw for Ins work. Fur there arc several kinds of dynamite, and llie blaster will do well to consider tint type of material to he blasted, its eumlslioro a aether v.el or dry. and perhaps other factors, before he make* a selection. Ditch blasting is olieelive in all classes of ground from solid rock \u hiaun hul the density of the material and its moisture entdeiii are factors to he considered in select big tin* explosive to use. lu dry earth or rock one may use a type of dynamite that would he wholly unsuitable under we I conditions. It is therefore im port ant. to use* good judgment in choosing the right tool for the task. There are two distinct methods of ditch blasting- - The Fur Traders Hie propugat ion met hod ami the electric method. The first is .suited to wet soils only, and we recommend that NO history of the United St t\It s wou'd he complete if only 50 or 00 per cent ,%/nritjhl nitroglycerin dynamite it. did not. give the fur t inders credit, for opening up to trade True, Lewis tIk ? vast territory mu] ('hirk, Pike, wLeosnt,goaf nthdeoNi1liiessrisgsoipvpeirnHireroh.ef used. holes By ths met hod only one cartridge...in a line properly spaced ami loaded---Is primed. rrieul agents had explored the region at llie head of their When tfiis earlrdge is set off, it detonates the entire troops, imf the fur traders were the commercial pioneers line of charged holes insiauth . Tim important, tilings to remember about ditch blasting hy the1 propagation of the West, They established friendly relations with the Indians hy trading with them and tlm.s prepared method an* these: (1 ] The ground must he web unci the i he wny for the permanent set l lenient of tin* region hy wetter llie heller. 12) I be only 50 or 00 per cent {lie white's. niraUjtd nitroglycerin dynamite. in exchange for pelts they offered dolli, trinkets, spiies, guns, ummimilion arid ma uufaeUired products and commodities of many kinds. IVnef rat mg new u iu ii ry where while men had nevergone before, they risked iheir lives to advance the interesfs of the fur trading companies who employed I hone Probably they did not Diteh blast ing hy the1 electric method is effect [ve either in wet or dry soils. Each hole is primed with an elect He blast nig cap, with I hr wires cornier led in series and all fired simultaneous!v In means of a blasting machine, how si rengl hs of Bed (Voss Extra or gelatin dynamite can he used when lids method is employed. realize lIn' part they war to play as nation builders,, AYo make the distinction here between types of dyna hut I he faet remains they helped to win the Wes I, mite and methods of their use because of late several Oil Pon! gunpowder and the trusty rifle were Iheir . ditch blasting fa.hires Lave hern exported to us. 1 he constant companions and protectors well as a part, I rouble In most instances lias been i ha I 1 he blaster did of their sleek in trade. It is of record that K. I. du Punt, not use the right, fool for I he task. Those who contem cle Nemours supplied the American Fur Company, nf plate drainage work will find llie du Pont booklet, which William A si or was president, wit h 25,000 pounds "Ditching with Dynamite," a. valuable guide in street- of powder a year. This product, too, played an impor irsg the right, type* of explosives to use under varying tant part In winning the West, as every American knows. combi ions. Pet jurs Is for copies should he addressed to We 4`.all flit' faet to mind in our from eover illustra any branch office of ! lie Explosives Depart men!, or to the Advertising Department al Wilmington, Delaware. tion, whirli Is a tribute to 1 he fur trader. The painting is hv Frank lx. Schoonover, whose work Is so well known to the American piihlie that further eoihineiit is innicu ossnr\. Choose the Right Tool for llie Task hfhX a carpenter undertake,-, to ml a hoard in WIwti, lie uses a saw, lie may ha ve a dozen saws available, hut lie chooses jus! mu- I he me best adapted for Hie work at hand, considering the texture of the wood, i Is coin lit inn. Hie direction of the grain and other fad ors. Likewise, the man who undertakes a ditch-blasting job needs dynamite, and it is just as important for him 12 The Ulp&'tnif.hjN shows' the patlow methods' for hhtufhifj difvhes THE 1>D PONT MAGAZINE Paint in the Fall--for Best Results And let du Font Prescription Paint Service help yon inspect, your buildings and select llie proper paints to use on them JNYOXE charged villi (he re sponsibility lor llie nminleuaiM-e Bv Ik (\ S11EKLER inspection oi all surfaces inside and out side. so Hmi a puhil mg s*"heduk* cm ire prepared lo include everything necessary to he iv- industrial plants and ec|uipmcnl should know pahiled. Me suggest that tins inspeelion he made with the* advantages ot' doing outside painting during the one of our engineers who can confer with you regarding bill TliOIlt l)S. any (pieslions that may arise concerning ymir paint There are a number of reasons why fail painting is a problems. Have11 his inspect ion made 1Imrouglily so that good tlung for the life of a structure: you may begin aS cnee cm a. eonstmrliw nminkiiniiee L Surfaces in need of paint sJiould nut he periidiled k> program that will bring you splendid returns over a pe remain unprotected during the winter months. Weather riod of years, luider du Font Prescript ion Paint Ser condi lions arc usually nuieh more severe in winter and vice, any mmsisal or abnormal eondh ions In your plant have an e\! renirly harmful died upon an nnpamted that would react unfavorably upuii the average paint surface. coal are taken into consideration ami a finish recom 2. The heat of the summer has thoroughly dried out mended i hal will gi ve good .sei-viee. Furthermore, your the nmis!nre from !he pores of the wood, so that there ('ill ire paint needs uiuv be standardized and charted so is better penetration of the life-giving oil of the pmut, 1 luil in future you will have complete guidance in at insuring maximum preservel ion. tending to your painting problem. A plan such as lids 3. The weather is usually more stable and net ter j v m.Ik in lover maintenance eusls and at the same sailed for painting than in the spring, and there X h>s lime more effieiciil protection for each -exposed surface. cJimu'e- of having the freshly painted siirkicr spoiled by If you nre inleresled In this idea, we suggest that frequent nuns. you eomiuiirsiente with any of flic branch others listed 4. There are no Hies nr gnu [s 1 o spoil I he appearance innler "Paints and Varnishes" on the inside buck cover nr u le newly painted work. of this number. Ik-fun1 having any painting done. make a thorough Another Use for Pyralin TRAPHANGERS cannot hrlplis- soiled by I he children's sticky fingers, S buiing lo l he con versa lion oHheir felknv passengers. Last night, for `FT i! can be clcanei I easily with soap and water am! made to look as good as new," "Where did you buy these tassels?" instance, while swaying on my sirup asked one of (he trio. And the one ad Riid Irving I o avoid crushing I lie feet of dressed mentioned the name of a local 'three ladies sitting nearby, I caught department store. Uiese excimna!ions: "Wonder if I could buy tassels like `"Oli. isn't lhal perfectly dear!" these (<> mukh ni.v shades, which are "Stunning ----- and what a pretty design!" darker I haii yours," continued the lady. "Yes. indeed," was the reply; They Now what eon Id they he bilking come in twelve different colors." a bon I f Glancing down, I saw Mini one' 'The trio left the cur presently, and (d the homeward-bound shoppers was left me wondering if Pyrahu in 1 his tin- proudly displaying a silken cord and idicd form were nol a new use. Subse tassel * you harm, the type ust*d on quent invest [gallon proved the hunch 'winsiow shades. The body of tin* tassel lo be correct. The tassel is a product of 'Va*s unusually attractive: it was fash ioned suit of some cream colored nrinfc- the II. F. Wnllisrr < 'nmpany, a manu facturer of drapery and upholstery bal am] hs'ally designed to give the iiprcsaioii of n nd -invcred fabric, 4 fit tiiKdl'l it: At 4} CO ittliv' f- Uj i if/'tt s til trimmings, a! 23d Street and Allegheny Avenue, Philadelphia, and also at. 1430 , ^kic ot the ladies commented on ils \\ right wood Avrmie, Chicago, 111. Wo add these ad appearance and (he owner said : "Thai's one reason dresses so that any render who maybe interested am V^hV J like 111esc cords so well The salesman lokl me write for full details about them. h;d rigid purl is made of Pyralin, and dial if It becomes 13 THE DU VOS T MAGAZINE To Irrigate 70,000 Acres {Continued from page 7) along I he evnler line of I hv Cornwall, (hi the eompld ion rf I he first drill. a second drift was driven on top of it. ;md llie malerlal was t nipped into cars in the first, drill. \\ hen the second drift was completed din1 first init was filled with concrete. A third drill was then driven over Ihe second and I lie material I rapped into ears on I he sceond drift., When iho third drift was finished the second was idled with concrete and llir fourth com menced, and I Ids opera! ion was repeated until I lie Corn wall reached the surl'ace. Un urn- occasion the water dii.l overllou' the cofferdam, 1ml the shafts were covered with plank, and v hen the flood subsided the water wn^ pumped out and tlie work resumed. Above the surfmv I he Cornwall is heavily reinferred holli vertically and horizontally. From hrdroek lo crest it is 521 Fed. high ;md varies in thickness from live feel to one foot, Alafcrial for the fills was hauled to the dam from the pits in ears and dumped from I resiles on the outer slopes of t he fills. Water jet s from hydraulic giant s were Iheii used to wash it: toward tin* renter. For (he till on the downstream side all ehiy and mud were washed from the material, leaving nothing but clean sand and gravel lo go into it. On the upstream side, day and silt from the filling were collected in a pool and made lo puddle against the dam for the greater sealing oiled. On either side of the rorewn.ll hundmls of thousands of Ions of louse material exert a tremendous I a (.era) pres sure against !ht' comparatively thin walk An excessive pressure on either side might work irreparable damage. Every precaution was I a ken fo avoid this and readings were made daily hi deled, any ddleel Ion in the wall. 1 hiring construction the upstream fill was kept from tlins* to six fed higher ilinn the fill on Ihc downstroani side. Uy prevent any tendeney of the more stable so rid mid gravel hi push (lie core wall over into the soft malerials on t he upsl ream side. The fill on t he upst ream side has a threc-to-one slope: (lie downslream fill has a slope of t wo to one. .Into Ihese fills went T;>70,0f)() cubic yards of material, and in tuldtlion, 12n,00U cubic yards of broken rock from luniiel and spillway excavation was deposited on both slopes. The spillway d cut through solid rock at, the west. end of the dam and is capable of handling four time's tin' known maximum flow of the Tirton River. The spillway dianud is eonerde lined and discharges into the river channel well below the loe of the ilimi. At the crest the Tidon Dam Is bUff fed long and 25 Jed wide. The dislaiuv from the toe of the fill on the upstream side lo the toe of (he fill on the downstream side is 1,1(0 feel. 'I he iolal height of the darn from foundation to crest is 521 fed and from river bed to crest, 235 fed.. It is said to he the highest, dam of its kind in the world. Since 1021 approximately 400,000 pun nds of explosives Lave been used in its cousin id. ion. The damming of I he Tieion River will flood 2,500 acres: the resulting reservoir will have a gross capacity of 202,500 acre fed of water, sufficient to irrigate 70,000 acres. The surface of I he water in the reservoir will he 2,020 find above sea levtd, assuring sufficient elevation to permit the water fo roach, withouf pumping, all the land which is lo he served from I his unit. The lad Ihaf irrigation is a success is liome out bv recent census figures. They show the increase in the total number of farms in Washington to he 18 per cent, while the increase in the number oi irrigated farms is 75 per cent. In a few years what is now sagebrush laud will be producing point nos. alfalfa and apples and aiding Yakima Tounty to uphold her reputation as one of the most productive sections of (lie Tinted Ktat.es. For the data In this article I 21m indebted to (he courtesy of the officials of lhe l;. S, Reclamation Service, mid for l he dduiis of const ruction--of the corewall especially I have rderred lo the article in the PiivifuIhdlder it- Engineer, by F. T, ( Yowe, formerly eons! nn*I io: 1 engineer on the projed , Nurserymen Use Dynamile ,4 XEW siM- for dynamite is reported by Daniel Y, JrV Pomeroy S Korn of Lockporl, New York, nursery men, a here I lie explosive was employed with unu.-md success in gigging trees, had talk because of the very dry season, trees were not, dug unlit u severe frost came; and then al a lime when if was imoossible to use shovels. Ahoul seven dirks of dynamite were placed in holes driven hv a sledge in (he center of I he nursery row. in this way they were able to take out about, twenty-five trees at a time without the slightest injury to the tap roots or fibrous mots. Often these lap roots are tod fed. long. The nurserymen staled that in all their ex perience in digging and shipping trees, (hey never sent out such a fine lot ns those shipped since they started to use dynamite. They continued to use the explosive for the same purpose last spring, although the trees could easily have: been dug with shovels. 14 T il K I) V V O X T M AGAZIM K Jot It Down--Do It--Tear It Out i JKRK, its eight words. you have the idea i.hal has Tmade* (Ik * Robinson Reminder so popular, This memorandum hook confabw a pad perforated info coupon-size sections so ilia! you can lcar out any memorandum when it ceases to he of use, regardless of when it wa x in a de or where it is located in the reminder. All other notes are left undisturbed until attended to. This m e m o r y jogger is efficient because it keeps live notes only; it is the clean desk idea ap plied to one's mem orandum hook. The .Robinson Manufacturing Company, of Westfield* -Ylassneliusel Ls, makes these reminders in sizes for hot ft the vest pocket and the coal, poekel. You can buy them S|t stationery stores everywhere. An extensive business is also done with roneerns who buy these reminders in quantities for distribution as udvcrl ising gifts. in such eases they arc made up so as U> he especially appropriate for the use of the company Hud distributes them. This is quite practical, because tIn* Fahiikokl covers of ilie.se hooks can he emboss* d so as !o bring on! I he trade-mark, slogan, plant, package or name of the concern, or any combination of these, in striking relief. Thru by the Snperfimsh process the covers can be colored to give par!irular emphasis Uj these feat arcs while enriching the general effect. One of our illustrations dunes lion l he trade-mark, slogan and name of a manufae! iirer were embossed on nue of these Fahriknid covers. making it a> faithful a "reminder" of that concern as of the memos ent rusted to it Idle Robinson Reminder pads are also detachable, so that the advertiser, by sending out new pads occasion ally, can keep the interest of his prospects alive. A Modem Rubberizing Plant {('onihnn'tl fnrm d; I his prevents slicking. The coaled fabric then passes over an automatic weighing scale which flashes a signal when the material is over or under weight. This equip ment is invaluable in controlling the weight of our finished material. Hhccf rubber products arc sheeted out in much ihe Sana* way, except I ha I I he rubber is nut sheeted on !o Ihe fabric. It [& sheeted out, dusted with stanh and XVi>ninl on a. shell. I he next step for coated fabrics depends on the tvp<* o[ material. Carriage clot h is embossed in any of several p'ani.s by being run through the steel rolls of largo cm`Ds.sing machines. Ollier types of calendered products such as raincoat material, bathing belt and bathing hag dialerink etc., are ready for vulcanization as soon as the excess starch, applied at the calender, is removes]. * urringc cloth, after being emhosM*d, is ready for v oHiishiiig and vnh auizal ion. The ilhisl.ral ion on page 5 i`uows oin* varnishing machine* which likewise festoons the materia! in llie vulcanizing oven. The luster and viscosity of tin* ^ arnish are undei-1 he constant at tent ion of thoehemicul department in order to insure uniformity at all times. The tempera lure of the vulcanizrrs is con trolled by automatic emit rollers and a record is kept of the temperature throughout each run. Unvarnished material is festooned in tin* same type of vitleaiiizcrs and handled in a similar manner. M aferiat vulcanized by means of sulfur chloride is likewise' festooned in acid- proof chambers, and the bun pernlure is controlled by means of lime-tempera!ure controllers. When tile vulcanization is complete, the material is neutralized and ready fur inspection. Sheet rubber products are vulcanized by means of stdfur chloride in the same manner except that the sheet rubber products arc tumbled in an atmosphere of sulfur chloride. Another type of coating winch we have not. touched unmi is "spreading." Many of our thinly coated fabrics THE DU FONT MAG AZIN L iu-e prepared by spreading a >ohe. i<m of rubber mi l he tare of I hr fabric. Double -expire material is prepared ijy eonil>ini1 by means of a doubling machine, l.wo coated fabrics. Tin- doubling machine itinsists of a steel and rubber roiI running logoi her under pressure, Many of ! he fabrics a re coated completely on I he .spreaders anti others are Itimlly calendered. The lahriis coaled troiu]>b*lt*1y tm I hr spivadcr go I h rough \ lie same final of ic t ;* 1 ions as Uio m.* ooa led on the calender. A I'l or vulennixal inn, the njalerhd is finally I akrn In our inspection depart jiient where it is given a most riitb! inspect it m. Samples of I he finished produef a re obi allied for the laboratory and u record X kepi of the quality of nidi jot, i hu* laboratory watches the material through out its journey through list' plaid. Our inspectors are concerned chiefly in watching I he uniformity of our products for quality, appearance, color, luster, weight and widfh. We f ru.st that this brief sketch of our activities in I lie product ion of rubberized products will convince you 111 ii f we have I ho ecjiiipnient and experience for produc ing almost, any product ui I his kind in which any reader id this magazine may be interested. Y\e parJiech rly welcome hiqnirios that, may lead to cooperative work wh h roiiccTii.s who arc now converting rubberized fabrics of any type into finished products. We have been very smsessfiii in working out. new ideas for and with this trade. Any impnry you may wish to direct to us wilt have the most thorough cons idem l ion. The Dueo Period in Furniture (C'sttiht ant pay- !} The "ball and claw" foot is a typical ('hippemhde delaiL 11 owe ver, < 'lumwe ('hippendnle pieces usually have four square, ornamented legs, TTh * Dubs X I \ period delight- in t he rococo ornamen tal ion of elaborate and intricate carving. J he table legs are massive, shaped like pedestals and highly emhel* tidied wills cursing, Due expert has said that if you ean find a piece of furniture with every inch covered wit h int ricate carving, t he design is surety Louis XIV. ' LonL X\ is also characterized by a great. {leal of carving, but I he legs arc of the muddied cabriole vn riety, most authenl ie Lean's elaborate use of inlays ami gilding. Straight lilies, rceo- like flut ing, carvings widt h siimihd.e draperies, the use of tin; vase or uni in decoraiive panels are identifying marks of the Ai him pent id. Other periods oll'c" fruitful fields lor study. I here is the Italian Renaissance, 'Tudor. Jacobean, Empire and olhciv I|- is hitm*sling to note that while the wonl "period" is usually associated with design only, that is not strictly correct. Period, when nghi.ly interpreted, also lias n bearing on both construct ion and finbh. Jac obean and Jxjiiis XIV ami Spanish Hcaaissauce are massive; Empire and Tolonial are sturdy; Ileppi'lw bite, light and airy. In I lie same way, finish lias an influence on the period, whether it be t he gilded carvings of Leaks X V, t he f Mined oak of Jacobean or the s4>-eallcd*T'rend i* or oil-rub finish of many of llie earlier designers. So increasingly impmianl a. part. is finish playing in design today IhaL the <iu Pont Company is now speaking of the "Dueo Period" in furniture. In explanui ion, it. is added t hat the I Lien 1 VriocLrefers to the modern era when the materials Slid design no longer outlast the iinish. t If wind, use is i\ to buy a well-made and aut herdh: repmduef ion of some dhoseft period if I he finish will fail in a year or two? The Dueo I TrimJ is preferable, be cause wills this finish, the furniture you buy today will remain until the pieces sire pa.-sed ors to other generations as true heirlooms. Of. more iinjneduil.c- concern is the fact that Dueo Period i :r\dlure will resist most of the use and abuse that pk<-e,s must, meet in everyday life. Ice water, boiling coffee, salt air, I lie hottest, weal her have no effect oil Dueo. It will mil chip, nor can it crack, craze or lose ils original hitler with age. When visiting the furniture shires during the August sales it will pay you to ask l Itf salesman about .Dueo ami the Dueo Period in furniiuixv ifa ' jvyd Vi -I# 4i !j )J- Ih fnif ut n l.nnia XI' /./V. P>orc /hrem/.'/fw uf Uvppdnhtti' ahichi hark rhuin: f< tr.it, a'ith Prittrc fjj IVafrs- p{yu'far dreoratimt; vece/a/. the oral; third. Ihr haul and hmp. Jh'f/M--- Shrrat'iH xiudd-hovh chuir (HSD E. I. d u Po n t d e Nemo u r s & Co., In c . General Executive Offices WILMINGTON DELAWARE I All Inquiries Regarding du Rout Products Should he Addressed to the Company--the Nearest Office ACIDS AND HEAVY CHEMICALS Acids, alums and miscellaneous heavy chemical products. Philadelphia,.Pa. 35th & Gray's Ferry Rd. Newark, N. J., 256 Vanderpool St. CELLOPHANE Du Pont Cellophane Company, Inc. Buffalo, N. Y. New York, N. Y., 40 W. 40th St. CHEMICAL PRODUCTS Bronze ponders, ether, collodion, house hold cement, leather belting cements. Dueo pyroxylin lacquers and enamels, split and patent leather solutions and other pyroxy lin preparations and solvents. Purlin, N. J. Chicago, 111., 2100 Elston Ave. Flint, Mich. San Francisco, Calif., 569 Mission St. DYESTUFFS Dyestuffs and dyestuff intermediates. Boston, Mass., 274 Franklin St. Charlotte, N. C., 232 W. First St. Chicago, 111., 1114 Union Trust Bldg. New York, N. Y., 8 Thomas St. Philadelphia, Pa., 126 S. Front St. Providence, R. I. 709 Hospital Trust Bldg. San Francisco, Calif., 569 Mission St. Bombay, India Exchange Bldg., Ballard Estate P. O. Box No. 1010 Kobe, Japan No. 88 Nakamachi-Dori P. O. Box No. 384 Shanghai, China Robert Dollar Bldg. 3 Canton Rd., P. O. Box No. 393 EXPLOSIVES Explosives for all industrial, agricultural, military and sporting uses. Birmingham, Ala. 601 Brown-Marx Bldg. Boston, Mass., Harvey Building Chauncey &`Bedford Sts. Buffalo, N. Y., Prudential Bldg. Chicago, III., 1814 McCormick Bldg. Denver, Colo., 406 Ideal Bldg. Duluth, Minn., Hartley Bldg. 742 E. Superior St. El Paso, Tex., 410 Mills Bldg. Huntington, W. Va. Robson-Prichard Bldg. Joplin. Mo., 816 Joplin Nat'l Bank Bldg. Kansas City, Mo., 225 Scarritt Bldg. Miami, Florida, Converse Bldg. 105 F'irst St., Southeast Mexico City, Mex. Edificio de La Mutua, 406 New York, N. Y., 120 Broadway Pittsburgh, Pa., Fulton Bldg. Portland, Ore. Northwestern National Bank Bldg. St. Louis, Mo. 17th Floor, Arcade Bldg. San Francisco, Calif., 569 Mission St. Seattle, Wash. Hoge Bldg., 2d Ave. Cherry St. Scranton, Pa., 710Traders Bank Bldg. Spokane, Wash. 721-22 Old National Bank Bldg. Riverside Ave. & Stevens St. Springfield, 111., 716 Reisch Bldg. FABRIKOID AND RUBBER FABRICS Fabrikoidfor automobile tops, body cover ing and upholstery; bookbinding, furni ture, luggage, novelties, etc. Pontop for auto tops and curtains. Tontine shade cloth. Ventube for mine ventilation. Newburgh, N. Y. San Francisco, Calif., 569 Mission St. RAYON Du Pont Rayon Company, Inc. P.O. Station B, Buffalo, N. Y. New York, N. Y., 132 Madison Ave. Old Hickory, Tenn. Reading, Pa., 31 N. 6th St. EVERDUR METAL No. 50 An easily workable corrosion-resistant alloy of copper and silicon. Du Pont Everdur Company Wilmington, Del. LITHOPONE, DRY COLORS & PIGMENTS Products for paint, ink, oilcloth, linoleum, rubber and other industries. Boston, Mass., Everett Station 49 Chicago, III., 2100 Elston Ave. Newark, N. J., 256 Vanderpool St. Philadelphia, Pa. 3500 Gray's Ferry Rd. PAINTS AND VARNISHES A complete line of paint and varnish prod ucts for all home and industrial uses. Boston, Mass., Everett Station 49 Chicago, 111., 2100 Elston Ave. Newark, N. J., 256 Vanderpool St. New York, N. Y., 21 E. 40th St. Philadelphia, Pa. 35th & Gray's Ferry Rd. PYRALIN AND VISCOLOID Pyralin--Arlington, N. J. Viscoloid--Leominster, Mass. Pyralin toiletware of Amber, Pearl.Shell ami Ivory and. combinations ofthese colors. Novelty and transparent sheeting, rods, tubes and beading. AlsoCleanab/eCol/ars. Boston, Mass. Harvey Bldg. 52 Chauncey St. Chicago, 111., North American Bldg. New York, N. Y., 21 E. 40th St. San Francisco, Calif., 569 Mission St. ,When you are in Atlantic City, Neiv Jersey Visit the Du Pont Products Exhibit, at 1121 Boardwalk e NEW DUCO-PEPJOD in_ FUKNITUR.Ein which the design ond materials no longer outlast the Finishj *> vv u" Q)u (tlmi I^h c o marks theperiod ofLife-long'Furniture, TinisJu The days are over when accide?its quickly rob cherishedfurniture of its youth .... Comfortable, constant use of furniture no longer holds the menace of mars and scars. The discouragement of ugly scratches and checks is banished . . . Now, the pieces you buy with loving care can retain their newness through days and months and years. For DUCO is a finish of life-long beauty--like a part of the furniture itself . . . Protected by DUCO, the furniture you buy today becomes the cherished heirlooms of tomorrow. ir DUCO Is unlike anything else -- it is a finish of satiny smoothness and astonishing durability, created and made only by du Pont. It is immune from injury under conditions that would utterly ruin less remarkable finishes. Duco-Period furniture is made by more than sixty prominent manufacturers and is now displayed by merchants throughout the country. Complete information regarding DUCO will be sent upon request. E. I. du Pont de Nemours & Co., Inc., Chemical Products Division, Pari in, N. J., Chicago, 111., or San Francisco, Cal., Flint Paint & Varnish, Limited, Toronto, Canada. # GThere is only ONE Duco --DUPONT Duco c)