Les merveilles de mechanismA moderne résumé des progrès récents en mécanique, physique et sciences de l'ingénieur . e pieds. Le poids de l'appareil,avec trois hommes, est d'environ huit mille livres, et itslifting dix mille livres de capacité. Le grand crédit dû M. Maxim pour son isemphasized succès lorsque nous considérons le nombre de choses qu'il hadto inventer pour accomplir son dessein. Il a dû faire aboiler et plus léger que les moteurs n'avaient jamais été madebefore. Il a dû inventer des avions qui n'auraient pas,rabat et il avait à concevoir un arrangement de l'ensemble de l'essieu de nation que l'intérieur de la limite

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The wonders of modern mechanismA résumé of recent progress in mechanical, physical, and engineering science . e feet. The weight of the apparatus, with three men, is about eight thousand pounds, and itslifting capacity ten thousand pounds. The great credit due Mr. Maxim for his success isemphasized when we consider how many things he hadto invent to accomplish his purpose. He had to make aboiler and engines lighter than any had ever been madebefore. He had to invent aeroplanes that would not flap, and he had to design an arrangement of the whole combi-nation that would come within the very limited restrictionsof weight, to go beyond which insured failure. He did allthese things, and he promises to do even better in the future. 134 WONDERS OF MODERN MECHANISM. On the memorable day when this machine was tried—July 31, 1894—it was run over the seventeen hundredfeet of track to see how much lifting power it would exerton the upper rails, for the careful inventor had arrangedboth upper and lower rails, so that when the machine wasraised off the ground it might not fly away and get lost. FiG. 24.. DiAGRAJi OF MAxras MACHINE.—P. P, propellers: S, S, shafts; p, p, pumps;T, T, tanks ; M, M, pipes; B, boiler; G, gasoline boiler, W, W, W, W, wheels forlower track ; U, U, U, U, wheels for upper rail. On the third trip the flying machine left the lower trackafter running four hundred and fifty feet, Anth the steam attwo hundred and seventy-five pounds, when it began tooscillate against the upper rails. At a distance of six hun-dred feet it rode entirely against the upper rails, the steam-pressure being then three hundred and ten pounds. Whenabout one thousand feet were covered the lifting pressurebecame so great that the rear rail-wheels were bent out ofposition and tore up the track, consisting of three-by-nine-inch timber rails, for a distance of about one hundred feet, resulting in the wrecking of the machine. Maxim had adynograpli attached, for recording the amount of l

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