. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Over 30,000 in use. Eminent surgeonscommend the Rubber Foot and are endorsed by the United Statesand many foreign Governments. Re-ceived the onlv Grand Prize awarded toArtificial Limbs at the Paris Exposition,also Highest Awards at the Buffalo Ex-position, Charleston Exposition,1902. A treatise, containing 500 pages,with 800 illustrations, sent free; alsomeasurement sheet. A A MARK^ J! Broadwayri. /I. iUai\IVC>, p,E^ YORK CITY Blue Printing Without the Sun. The art of ma
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . Over 30,000 in use. Eminent surgeonscommend the Rubber Foot and are endorsed by the United Statesand many foreign Governments. Re-ceived the onlv Grand Prize awarded toArtificial Limbs at the Paris Exposition,also Highest Awards at the Buffalo Ex-position, Charleston Exposition,1902. A treatise, containing 500 pages,with 800 illustrations, sent free; alsomeasurement sheet. A A MARK^ J! Broadwayri. /I. iUai\IVC>, p,E^ YORK CITY Blue Printing Without the Sun. The art of making blue prints withoutthe aid of the sum is explained in a veryneat little pamphlet which has been gotout by the Pittsburgh Blue Print Com-pany. The principle of the thing is that(wo curved semi-cylindrical glass plate?;cparated along their edges by strips ofwood arc rigidly bound together by topnul bottom brass bands. A convenient. ArrAR.\TUS FOR MAKING BLUE canvas curtain is secured around the out-side and the whole stands upon whatmay be called a turn-table base. The op-eration consists of placing the tracingnext to the curved glass plate, the sensi-tized paper behind the tracing and allheld in place by drawing tight the can-vas curtain. A counterweighted electricarc lamp is then allowed to descendinto the center of the glass cylinder andan auto-stop mechanism brings it to restand starts it up and out of the machine is economical of space andthe operation is economical of is necessarily only a very brief out-line of how the machine does the to the company if vou want moredetails and fuller descriptions of thewhole ingenious apparatus. ago. Elasticity or flexibility, if one mayso speak of paint, is the feature whichthe Standard Paint Company, of NewYork, claims for their product. Theli(|iiid is free running and it developsa rubber-like r|uality, which enables itto stre
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
