. Ingegneria locomotiva: Una rivista pratica di energia motrice ferroviaria e materiale rotabile. La studentscan vede le immagini proiettate sul grande schermo alla fine della vettura, E l'in-structor può spiegare ad una grande classe, qualche cosa che non può essere fatto quando le valvole di sezione o modelli sono utilizzati, UN set completo di slide lanterna per una di queste vetture com-prie circa novecento separati pic-tures. Nel caso del freno pneumatico ap-paratus le valvole sono mostrate in ciascuna delle diverse posizioni che possono assumere durante il loro funzionamento. Nella vista del gruppo fuori dai caris la classe dei giovani m.
1783 x 1401 px | 30,2 x 23,7 cm | 11,9 x 9,3 inches | 150dpi
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. Locomotive engineering : a practical journal of railway motive power and rolling stock . the studentscan see the pictures projected on the largescreen at the end of the car, and the in-structor can explain to a large class, some-thing that cannot be done when sectionalvalves or models are used, A full set oflantern slides for one of these cars com-prises about nine hundred separate pic-tures. In the case of the air-brake ap-paratus the valves are shown in each ofthe many different positions they may bein during their operations. In the view of the group outside the caris the class of young men now being ex-amined for promotion to engineers on theChicago & Northwestern Railway at themain shops at Chicago, the traveling en-gineers in charge of the examination andtheir air-brake instructor, together withthe force of instructors employed on thecar. The Ferracute Machine Company, ofBridgeton, N. J., have three exhibits ofpresses, dies and other sheet-metal ma-chinery at the Paris Exposition. One oftheir large presses is so constructed as torelieve the frame from stresses.. INTERIOR OF CAR, LOOKING TOWARD STEREOPTICON. read with pleasure the story of the menwhose stupendous labors brought intopractical form the most potent forces ofnature that have ever been subdued forthe use and comfort of the human race.The reflective man must view with admir-ation the persistent work of philosophersand mechanics who found steam as a mys-terious uncontrollable agency, and reduced began to assert that the vapor from boilingwater, which played havoc with the kail-pot, was a natural force whose powermight at some time be utilized for usefulpurposes. Thus speculation about steambegan. Its roots were for centuries nofarther spreading than those from a grainof mustard seed, but they were alive andstrong with potentialities. June, 1900. LOCOMOTIVE ENGINEERING 257 There is no means of knowing how longago people began trying to use, in differentways, the force obtained from the expan-sion of
