Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 346
se until the word is given. Thecaptain then adjusts the load of ballast, throwing offsufficient to allow the balloon to pull upward lightlyagainst the men who are holding it. A little moreballast is then thrown off, and the word given to letgo. The trail-rope should be in charge of some onewho will… … ^ o m 1 i bO ■s ^ o . s t ^ fl o O) Xi A H S >» d T5 o e3 ^ P t-i c3 ^ & 346 BALLOONS: HOW TO OPERATE. This is ordinarily about 2,000 feet. If the sunshould be shining the gas in the balloon Avill be ex-panded by the heat, and some of it will be forced outthrough the neck. This explains the…
Aeronautics
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