Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 128
ace. BALLOONS 117 131. Balloons. The use of air-ships or balloons is madepossible by the buoyancy of the air. A balloon is a large,light, gas-tight bag filled with some gas lighter than air,usually hydrogen or illuminating gas. Fig. 146 shows theconstruction of an air-ship devised by Count Zeppelin… … FiO. 146.^Zeppelins air-ship, over 400 ft. long and able to carry 30 passengers. is a balance between the two forces it simply floats at aconstant height. The aeronaut maintains his position byadjusting the weight of the balloon to the buoyancy of the air.When he desires to ascend he throws out…
Physics
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