Bacon, Gertrude, 1874-1949 · New York, Dodd, Mead & company; [etc., etc.] · leaf 30
Filling a Hot Air Balloon. effect of mixing these substances together isto set up a brisk chemical action, in the courseof which hydrogen gas is given off. In thiscase the hydrogen thus liberated came throughthe pipes and filled the balloon. The great dis-advantages of this method of… … oa oMO P W 32 BALLOONS AND FLYING MACHINES It is said that when Roberts and Charlesreturned from their adventurous voyage theywere immediately arrested and thrown intoprison by order of the King, who consideredit his duty to put a stop to his subjects risk-ing their lives in such dangerous…
Aeronautics
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