The wonders of modern mechanismA résumé of recent progress in mechanical, physical, and engineering science . ially greater, sothat where exposed wires have been objected to the cable-road has proved a boon. Some information regarding the storage-battery systemof operating cars will be found in the chapter on TheStorage-Battery, and the compressed-air system is alsoreferred to in the chapter on Compressed-Air jNIechan-isms. Ammonia-motors and gas-motors have received someattention as affording desirable means of power forstreet-cars. As ammonia vaporizes at a very low temper-ature, it has been
The wonders of modern mechanismA résumé of recent progress in mechanical, physical, and engineering science . ially greater, sothat where exposed wires have been objected to the cable-road has proved a boon. Some information regarding the storage-battery systemof operating cars will be found in the chapter on TheStorage-Battery, and the compressed-air system is alsoreferred to in the chapter on Compressed-Air jNIechan-isms. Ammonia-motors and gas-motors have received someattention as affording desirable means of power forstreet-cars. As ammonia vaporizes at a very low temper-ature, it has been paiticularly attractive to experimenterssearching for a better expansive medium than steam. Atthe recent Chicago Exposition the world was made ac-quainted with a promising form of ammonia-motor, de-vised by a Mr. MacMahon. He has developed a meansof securing highly purified anhydrous ammonia, and ofpreserving the exhaust vapor, which, in the case of a 206 WONDERS OF MODERN MECHANISM. steam-engine, is allowed to esca])e. The ammonia beingused over and over, the only cost of operation is the coal Fig. AMMONIA-MOTOR APPLIED TO STREET CiR. burned. Under somewhat unfavorable conditions, ^vas able to drive liis motor-ear at a speed offifteen miles an hour, with a coal consumption of only twocents a mile. This showing w^as so favorable that moremay be expected of the ammonia-motor in the future. The compressed-gas system of car-propulsion offers thesame general advantages that are claimed for the storage-battery and compressed air systems—viz., absence of smoke,dirt, wires, and noise. There are two systems of gas motor-power before the public, both European—tlie Guillieronand Amrein, and the Luhrig systems. The latter is shownin the illustration. Twin engines are placed on each side ofthe car, under the seats, which run lengthwise. Fourteenhorse-power is required for a car seating sixteen the roof are cold-water reservoirs, while the gas reser-voirs
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Keywords: ., bookcentury1800, booksubjectmachinery, booksubjectmechanicalengi
