. Factory and industrial management . r thiswork (Fig. i) was built just prior to 1866 from designs of Mr. Jno. , chairman of the Massachusetts State Commission, and Doane, chief engineer for the tunnel construction. After thecompletion of this tunnel, this compressor was moved to Proctor, Ver-mont, where it has been in use ever since, compressing air to a press-ure of about three atmospheres to the square inch. This air is usedfor operating channeling machines and rock drills of modern construc-tion, which have revolutionized the method of quarrying. In the arrow-throwing gun
. Factory and industrial management . r thiswork (Fig. i) was built just prior to 1866 from designs of Mr. Jno. , chairman of the Massachusetts State Commission, and Doane, chief engineer for the tunnel construction. After thecompletion of this tunnel, this compressor was moved to Proctor, Ver-mont, where it has been in use ever since, compressing air to a press-ure of about three atmospheres to the square inch. This air is usedfor operating channeling machines and rock drills of modern construc-tion, which have revolutionized the method of quarrying. In the arrow-throwing gun of Ctesibus, the ancient air mattress(Fig. 2), and the compressor used at the Mont Cenis tunnel (Fig. 3)we find the prototypes of the present pneumatic dynamite gun () now in use by the Cubans ; the sleeping-car equipped with pneu-matic chair-seats, pillows, and mattresses inflated by compressed airsupplied from the air-brake pump on the engine ; and the cross- com-pound condensing Corliss compressor plant (Fig. 5), now used in. FIG. I. THE COMPRESSOR USED AT THE HOOSAC TUNNEL. THE USE OF COMPRESSED AIR. 659 operating the machin-ery employed in exca-vating the colossal res-ervoirs at Jerome Park,which are designed tosupply potable water tothe city of New the air-lift pumpof to-day, for deepwells, shows the evolu-tion of Heros Foun-tain, a pneumatic ex-periment familiar to allstudents of natural phil-osophy. The pneuma-tic tube system for theconveyance of parcelsor mail matter, such asis shortly to be installedto connect the NewYork and Brooklyn postoffices via the Brooklyn bridge and the Pennsylvania & Reading ter-minals with the Philadelphia post office, had its origin nearly twocenturies ago in the fertile brain of Dr. Denys Papin, of Blois, 1869 George Westinghouse produced his first air brake, the de-
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
