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N50644 We*ve Painted Your House a Thousand Times DUPl10138562 Q/ffe DU PONT^a^azine PAINTED CATERPILLARS J_ h e wheel, one of mankind's earli est inventions, probablv has done more than any other produce ot mar's genius to make possible the civilization of today But the verv conditions it helped create brought out its limitations and paved the wav for i further notable development:. The wheel requires a reasonably hard surface on which to roll effec tively, it bogs down in loose sand, mud or soft ground. But not until it bucked up against modern power requirements did its inefficiency on a yielding surface become acute enough to demand an improvement. Thus crawler traction, offspring of a vener able parent, did not come into .its own until the twentieth centurv. Two voui.g men who took Horace Greeley s advice and went West are credited with the development of crawler traction. Daniel Best of Iowa and Benjamin Holt of New Hampshire had the same idea when thev joined the gold rush to California in '49. Both, of course, sough: "fame and fortune." Both were to dig their stakes from the soil, but not in the wav they originally planned Hm bfCtfmp so ho: when it vjs used in h-jht.nq an o,l vrH Kr< tt-at soeraior CoJd not icuch ihf rrflal yvt .IS du Pom tin,sh Ifniiififd n perfect condition Here are ewiulnig things that are not only extreniel i useful. but attractive as well By F. HAL HIGGINS Bcsc walked out to the Pacitic Coast and tried his hand at gold mining. Holt and his brothers sailed around the Horn and began importing wagon materials for freighting. This business led them naturally into chc P *.G B Tk r F* manufacture of wheels and wagons Bv i8S^, Best and the Holt brothers were rivals for the steam engine and combined harvester business of the Coast. These two firms grew rapidly and became keen competitors. California ranchers met great diffi culties in their efforts to cultivate and harvest over chc soft reclaimed lands m the San Joaquin and Sacra mento river vallevs. Attempts 10 solve these problems bv designing machines with broad, cleared wheels came to a head :n 1905,when Benjamin Holt built a pair of tracks and in stalled them on a steam tractor. Results in improved traction and power were highlv gratifying, even with this crude machine. This was rhe beginning of a new day in mobile power, for it marked the hrsc success ful application of crawler rraction. Development of the track type tractor bv both Holt and C. L. Best went forward rapidly. Weight was reduced to more efficient limits when gasoline enein.es replaced steam early m this ccnturv. Crawler or "caccrpdhir ' traction today has lifted the wheel out of power-wasting soft ground and puc it on an endless eham of sclMawng steel rails This eiublcs the load to be widclv dis tributed; positive traction is secured with low frictional resistance This tvpc of tractor ji-h)c\cJ 10 nrsc crear victorv ;n rhe :r.i ro p< >rn I 15W 0 0 1 1 8 9 6 DUP110138563 '-jfi.e DU PONT.^ii^azine t: >n >f saprhes wro^s the Mu m'-c Desert ur:rc construct: on of the Los .i.t J, i a -JC \'u other piece oi equipment ould negotiate the iojs or the scee , roadless rnounuin ^er_Jes But it was the Uorld V* ar that made "Caterpillar" a housencid v. ord. In 191s the Hoi: and Best interests were merged into the present Cater pillar Tractor Co , which now also produces a caned line of combined hare esters and road machinery. Road building and ramming were the main fields for Caterpil lar tractors for years. But new uses constantlv were being found by nimble-witted operators. Pipe-line construction, oil :icld work, nursery and ocher specialized types of farming, snow removal, railroad maintenance and construction, house- moving, forest-hre trail building, ditch construction and terrace build ing are onlv a lew of the side fields'' pioneered by Caterpillar. A fascinating storv could be written on the "Adventures of Caterpillar Afield." This talc would lump from Tokvo, where a representative of the companv recently witnessed the at tempted assassination of Emperor Hirohito bv a bomb-thrower, to Mount Olympus in Greece, where a Caterpillar ran over a notorious bandit sleeping in a thistle patch, so slowing him up thac the police capcured him. These incidents illuscrate the v.\ orld-wide use of this equipment. Most people think of a tractor as a piece of machinerv designed to do a given tub as efficiently as possible. But the operator of a Caterpillar has almost as much "pride of ownership" as the driver of an expensive automo bile N'uturallv, he expects it co be a fine piece of mechanism. But he also demands that it be good looking That is onlv one of the reasons w'nv the Caterpillar Tractor Co. todav oiTers colorful du Pont finishes on its tractors and also on irs combined harvesters and road machinerv. The "paint job'' on a Caterpillar must be the best chat can be obtained. for it is forced to withstand che onslaughts of sand, rock, mud and dust, uf snow and icc .n sub-zero temperatures and the blazing ravs of the sun. Also, the Caterpillar Tractor Co has found that the color and general attractiveness of the du Pont nnisocs ha\c a definite sales value. Such a pleasing "dress" is of no little impor tance in helping to sell the product And, by creating pride of ownership, these finishes inspire the operator to take better care of his tractor. All dealers are urged by the companv r<< keep these points in mind. The shops of most all agents are equipped to turn out rebuilt machines that look like new This is accom plished by using the same du Pout finishes as arc employed at the factory. Tti* Ca:erDillr tractor looks lilt; <s huge insect it across a salt bed m Califorri*. A cu Pont hnuh O'Otrrtt 'tj mct! Surface! Ir&m the iitvitsn of the wit JLBW 0011897 DUPl10138564 Cl Cl DU ^9 KEEP YOUR WHITE HOUSE WHITE T,,. h e trim white house v\. i:h the green shutters is an American institution. By scrolling through anv residential section you can see the widespread appeal of this color scheme. In this same walk, however, y o u will un doubtedly nonce how little of the fresh, crisp whiteness of new paint remains after a few months The brightness of the white is destroyed by smoke and dust and, before the second summer has passed, the green has cither blackened with mildew or faded from sunlight. How to make white houses stav white, and green shutters stay green, has been one of the most important problems facing paint manufacturers for many years. The solution is one of those fascinating romances of modern chemical research, backed up bv a testing program of nurion-wide scope, on a scale never before attempted with a panic product. Anv house paint contains cwo dif ferent tvpes of materials. First, there must be pigments, which are white or colored powders chat give color and hiding power. Bv themselves, however, thepigments areof no value without the second material, called the vehicle, which serves to bind or The story of Du lux White jor exterior pointing - stars whiter--lasts louder Bv C. F. RASSWEILER lltllA IUS THESE onyn.Mi.N(, v ia v n t v i.e s f.txtks Bettor--.Sf/jv.i Whiter i Dries f.ist(.r, colLcts less Jir t ,imJ hugs JurirH; Jrsing. Arts up more ro x state w here it f. mu:ketud b\ sucdcii stornn i Dries free from tuck :> Du'u\ (xcnnies self-cleuinnc \fter ,i period of cvrosure. clean!incss ul the surface s n\; inuincJ hv line, sluillmv dulkiug ^. Du I u\ Joes not spot or 'rnudge casi Iv uri doorjambs, pillars, urj i> mure ri. adiI v w asiieJ clean \t ore DirraM^-- Pro! eels Surface Longer i l-i' e ' ear ce .r> mJicati. itlrv p\> eeni limber lile fur Dulu' ' Compared with urchodfie p.itnr In n>.in< c->ev it has lasted twice as lentjas nrher ` rushes s D'jU\ i' hijhlv impeuneaMe to moisture U Oulu v resists checking in,*1 crack ing. Dulu\ nears awav h\ slow , shjHovv chalking, leasing jn escellcnt sur1 j c c fur repainting ecnicnt the pigment particles together into ,i continuous, adherent him. Linseed oil has been almost univer sally used as the vehicle in outside house paints. Even though it is the best of the naturally occurring mate rials, this oil, bv itself, has little resistance to the destructive influ ences of weather conditions. The making of durable paints has depended on the development and selection of pigments which would protect the oil to the greatest extent '1 he du Pont Company--one of the foremost pig ment producers of the country, as well as a m-kcr of paints--has plavcd a prominent part in this work. To the research chemists, however, this seemed only a half-hearted at* tack. "If the vehicle is the weak part of paint," they reasoned, "let's not scop with simply trying to protect ic with new pigments, Ice's make a binder chat is really durable in itself. On this program the du Pont Com pany has spent six vears of effort and hundreds of thousands of dollars. Over four thousand materials were made and tested Many were failures, many were better rhan previous prod ucts, but nor good enough; a limited P <G Tw e i.v h iLBW 00 I 1898 DUPl10138565 ~Jne DU o% stood out with properties that urra^eJ .hi original hopes. * Luisced -_ul h'. icscif protected wood ,n ,.n cNpoisLrc terpe tor less chan six months L rider the s.^me conditions, mr o: these new vehicles, called Ddux oil. practiced wv.oj between eighteen .. nd rw11v-t. ui r months The esc of tho oil instead ol linseed oil, us a binder for the pigment p.ir- twlcs, was an uh\io.;s wav to make the paint last lunger. Also, when using a weak hinder like linseed oil. the pigments had to be selected with the object of protecting the oil rather than for whiteness retention. When using Du lax oil, the vehicle was so durable chat it needed less protection ani the pigments could he selected for their whiteness and whiceness retention, and the resulting product was still more durable than the best oil paint. Almost five vears ago du Pont chemists recognized the possibilities of developing white and green house finishes from this amazing new vehi cle. The past five years have been spent in the most thorough and exhaustive testing of these new fin ishes. First, on exposure fences in all parts of the councry where ^o,coo panels have been exposed, many of them turned up it 45 toward the sun and rain, an angle at which paints fail t.vicc or three times as rapidly as on a house, then, on selected houses around the country, and, finally, rhe most practical test of all, representative master painters, using their own methods, have applied these finishes to all sorts of surfaces. The first Dulux white exposure panel is still in good condition. A built-up vertical section of white pine clapboards finished with three coats of Dulux has faced the full force of southern exposure in Delaware for five years and is still intact and snowy white. Some of the Dulux- finished houses are three vears old. Over a thousand of them have been painted with this product tor more than a vear. Tests lij'e been made in every section ol the country The most conserv ati' e exccuri \ c has been convinced. A dream of six vears ..go h i\ be-, nmc ,i realitv. and the house holJer with his white hiuwe and oncer, -'ll utters m.iv now procure a Dulux F.xtcrior White that will stav white and a Trim and Trellis Green tli.it will rc.illv mu v green. Anyone seeing a group of Duluxpaintcd houses tor the first time jlwavs asks, AVfiv Joes the Dulux White stuv so white''" The answer is as interesting as the score of the development of this finish. In the arst place, Dulux dries rapidlv Three to five hours after it is applied, it is drv enough so rhat dirt ano bugs no longer adhere co it. Oil pa ir.ts stav wet for almost twentvfour hours and arc definitely stickv for forty-eight hours cor more. Second, Dulux flows oat ro a smooth, almost enamel-like surface which is hard and free from anv sign of stickiness or tack. It is difficult for dirt co cling to such a surface, and the mold colonics which grow on oil paints and blacken green trim find it hard ro gain a foothold. Oil paints have uneven surfaces, due to brush marks, and even after several months' drying are soft and slightly tacky. Running the finger tips over the two products tells this part of the story better than words. 1 hen. third, tne Dulux becomes sell Ge.mmg After a period of expo sure an extremely fine, white, chulkv matcru i begin* to form on the surface. Some -..f t:us washes awuv with the ram. v.irrv me tile dirt along with it Most -a t111s J:.!k dings to the iide -it tile h.'-.T-c ..nd goes :c a brilliant w 1mcueT!11s p:i.we>> a u: steadilv, .K rr pan red bv the gradual wearing awav of rhe film. until after vears ul exposure it becomes so chin that repainting is necessurv Likewise, all cood oil-tvpc house paints -.nalk but, with them, the material rhat washes away is coarse and Joes not have the intense white ness of the Dulux chalk. Mso, in the case of oil paints, the dulk comes a wav unrv enlv, lea \ mg a splotch)' or shadowed appearance Being coarse, the oil-rmnt chalk leaves j rough surface w h :c h catches more dirt, while the Dulux chalk is fine, and even after vears of exposure it can be wiped away and the surface underneath is so smooth that it is actually glossy. The Dulux White not ou!v stavs whiter than oil paints but also lasts longer. In the first place, the Dulux him wears awav more slowly than an oil paint film. This is demonstrated both bv film thickness measurements and by actual exposure tests. The chalking of Dulux is very fine and shallow, whereas the chalking of an uil paint is coarse and deep. The apparent amount of chalk clinging to the side of a house is no measure of \Co7innued on page aj 1 Heif Dfinrls each uf which was hniihcd w.ih so'-' h gh-grad? exterior while pd.nt, w'f r>30if'J 01 Ptr r*l fe-ic* a' arv *ngl* q ( 4J5, laonq MOuP Alter thirty ji* n*onrhi, 'on? alter th othen had failed CO">e>lTely 'he Dj Io oaoe. shown ,n cente' -vai j:.4 sncw> while and aherd'^g adecedte protection tc the Surface Pa OU Th I IVTFES LB W 001l099 DUP110138566 ) \ HERE COMES THE FIRE ENGINE Po o l 'n d in g hoofs, dinging gongs, gleaming brass and nickel, a hash of red -chat was the hre department of vesterdav Now the motor cur has supplanted the horse, the siren has replaced the gong, but the combina tion of shiny nickel and br^ss and flaming red paint still remains the symbol of che brave hredightcrs. To maintain their apparatus in perfect cunJiuor. at all times has always beer, a laborious task. In recent years, howe\tr, manufacturers of tire equipment have used better materials and finishes, \\ ith che result chat tire companies find maintenance a less serious problem r ban heretofore. Duco has pl.ivcJ an important part in this. It can withstand heat and cold, changing climatic conditions, and abusive treatment without peel ing off or cracking, and the finish can easily be rescored to its original beauty when soiled. The -Seagrave Modem fire-lighting tv/nipment i\ built for hurd service . jnd <o is the Duco uhich jdoms it lb- R C. WILLIAMS Corporation of Columbus, Ohio, which made the two machines illus trated on this page, has found it id', ancageous to use Duco on all its lire trucks. The c itv of Muskogee, Oklahoma, is the proud owner of the one above. It is of che centrifugal pumping cvpe with a capacitv of i,ooo gallons per minute In place of the usual fortvgailon chemical tank, it carries a hundred-gallon water rank, along with i,aoo feet of two and one-half inch hose. The six-eviinder motor de velops (go horsepower and, although the truck weighs more chan five :uu>. a speed of over sixty miles per hu ;r can be obtained when accessary The body is finished in red Diuo, the-, prov iding a durable surface which so essential for apparatus of this kind A departure from the usual coWr scheme was made when white selected for the Quadruple model shown below It was made for Clunuce, Kansas, and is a combina tion pumper, hose-earner, laddertruck and booster tank. ft has a capacity of six hundred callous per minute. The equipment includes a centrifugal pump, a full complement of ladders and i,ono ree: of two ..pd one-half inch hose Fire engines made bv the Scagr.oe Corporation guard more chan i.rv-o cities and towns throughout ihe country and all of this fire equipment is finished with du Pont Duco. DUPl10138567 DU PONT.(i.;,uzir.a XEEP U)l !'. U nITE HOI 'E WHITE rhc >j'ecJ with whkh :i:e uni i> ucjrr.t; .i'1, .i\ TouAi i tv\ o-vear--. >fi.i D:. i u \need house .u k I ' jur h. . jiiies ,iu .iv u h i ce. because die Nul k - ;iC ri.iccn.il cherc ,s tine jr.J GiuuW c > vu.ur Touch j r\v o-\ear-old house .united wi til nil paint and nn.rhair! bni;^ .i". .i1. lie tie material because, e-sen chough the iUrta.e is v -c .o ip .i: .iu j v rapidly. the chalk is oiarse and does rot base the hiJ.inp power and clinging properties ot the Dulux chalk. It is simph the differ ence between pucting vour hand into a dour barrel and into a sugar bowl. Atter two or three vrars on a house, an oil paint usually begins to form an alligacor hide of line cheeking, and the paint then either wears away rapidly to the wuod or the cheek marks deepen into cracks and the paint llakes awav. This is a serious tvpcof failure because such a surface is difficult to repaint. Dulux is resis tant to checking anJ cracking. It c- weden t -urtucC lor rei'j m c.P p Fi \ e ear rciti indicate th.it it cvill last ::ftv per cenc longer dun oil paints Ir maiiv cases it has lasted twice as loHij .is orthodox T.l i;Ui In the case of green trim pushes, this greater durability is accompanied bv better color retention. Void and fungus nnc it nard to secure a foot* hold on the smooth, hard wrUce to blacken it Ir,stead of the pigment having to protect che vehicle, the Dulux oil actually protects the pie men c, and the Trim and Trellis Green holds its color for unusually long periods. Dulux, jltho'Jgh rcmarkahlv dura ble, cannot he expected to give sanslactorv results unless proper precau tions are taken in its application. Even the most durable finish will fail quicklv if applied to an improperly prepared surface. Dulux White and Trim and Trellis Green can be applied by any skilled painter bv brush or spray Thev raav be used over anv surface that is con sidered in good condition for painting with ordinary paints. However, anv run \o matte: h.>w .i,,r..ble :Pc nmsh, it .minot adhere to urocasonec or poor lumber, or .n places w here there is moisture behind the tiAn It the old paint is fijkirg and pceiire, :t will '.arrv oft with it anv r.cw coating applied If the paint on. vjur House has failed bv blistering or h\ peeling, it is probable that ar.v new finish will also tail ;n che sjme man ner You must look lor the cause .if rhc crucible somewhere besides m the paint. Improper construction, pour Hashing, bad lumber or impropci earlier paintings mav be che cause Dulux is not the cure all tor these conditions. Improper construction should be corrected, and old baking paint should be burned oh. But if your house is built properly and is in condition for painting, and if vou intend to have rhe work done by skilled and conscientious workmen, then Dulux White and Trim and Trellis Green offer you a chance to have the outstanding house in the neighborhood and at che same time to save bv lengthening the time between repainnngs. DO YOU PLAY CONTRACT? Co n t r a c t bridge and Culbertson --che names are synonymous. According to the latest estimates, there are about 10,000,000 bridge enchususcs in chis country, and con tract is daily broadening its appeal. This diversion is so intensely inter esting that every minute which can be conserved lends marc fascination to the game. The old-fashioned method of scor ing, wherein the rally was figured, first bv ascertaining what were the rewards and penalties and then com puting them on paper for final entrv on the score sheet, undulv held up che next deal and detracted from the fullest enjoyment of the game. Foreseeing the need for avoiding this annoying loss of time, Jacques A. Salz, in collaboration wich Ely Culbertson, has introduced the auto matic computing penal illustrated here. Ir 11. an invaluable aid to cverv contract bridge plaver, because ir eliminates errors, avoids disputes, and saves rime in scoring. There is nothing to get out of order, since the mechanism is durably constructed, and its operations are reliable and accurate. It is a simple but ingenious invention. Bv merely turning che movable barrel until che desired r.umbci of over tricks or under tricks is shown in che center column marked "Tricks," the answer instantly appears Totals are shown for vulnerable, not vulnerable, doub led, noc doubled, or redoubled, as the case mav be. Under tricks arc indi cated in red; over tricks, in black. Th is pencil can be used for contract bridge and for anv other purpose. It propels, repels and expels the lead; has an eraser and a vhamher tor reserve lead. Except for che findings and inner mechanism, it is made entirely of Du Pont Pyrahn, a beau tiful, lustrous, durable material. The Culbertson Scoring Pencil has aroused considciable incercst since its introduction, and the manufacturers anticipate acceptance from everv plaver of contract bridge. A postal card or letter direct to the Salz Brothers, Inc , ici West 101st Street, New York City, will promptly bring further information and prices to those interested. P^.H Tw ENTY-Tw u LBW 0011901