Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 310
BALLOONS: THE DIRIGIBLE. 309 made use of the air-bag suggested by Meusnier forthe balloon of the Duke of Chartres in 1784, al-though in an original way, at first using a pneumaticpump to inflate it^ and later a rotatory fan. l^eitherprevented the gas-bag from buckling and coming
Aeronautics
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