The Borderland of Science a Series of Familiar Dissertations On Stars Planets
The Borderland of Science a Series of Familiar Dissertations On Stars Planets
Richard a Richard Anthony Proctor
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A power which could propel the car of a balloon through calm air at the rate of twenty miles an hour, would cause precisely the same effect on the balloon itself, as though the car were fixed, while a heavy wind was blowing 326 THE BORDERLAND OF SCIENCE. against the balloon. We know what the effect would be in this latter case ; the balloon would soon be made a complete wreck : and nothing else could happen in the former case. But it may be seriously questioned, whether buoy- ancy is a desirabl...e feature in any form of flying- machine. We have seen that a degree of buoyancy sufficient to secure actual floatation in the air is in- compatible with aerial navigation. We may now go further, and urge that even a less degree of buoyancy would be a mischievous feature in a flying- machine. M. Nadar, the balloonist, makes a significant, though not strictly accurate observation on this point, in his little book on flying. Passing through the streets of Paris, during the sedileship of Haussmann, he heard a workman call from the roof of a house to a fellow- workman below, to throw a sponge up.
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