Bacon, Gertrude, 1874-1949 · London ; New York ; Toronto ; Melbourne : Cassell and Company · leaf 34
ormulated the lawthat the pressure exerted by a fluid is normal—that isto say, at right angles—to the surface. Air is a fluid,just as much as water is a fluid, only a more rarefied andunstable one; thus if you have an upright plane, forexample, and the wind blows upon it, it will move forwardin a… … Typical Kites 20 HOW MEN FLY to itself, which means, In this case, that it will rise at anangle into the air. A little diagram will make this clear:
Juvenile literature · Aeronautics · Airplanes
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