Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 68
to fall. But as the projectile continues to turn, stillmaintaining its inclined plane, the resista,nce of the aircauses it to fall back in a direction parallel to this plane—that is to say, towards its point of departure. RESISTANCE OF THE AIR. SI WHIRLING RINGS. If you bore a hole in a box made of… … Fig. 40.—Mode of making Smoke-rings. Every one has seen smokers making pretty whitediadems which they watch turning in the air with greatsatisfaction. It is a matter of daily observation that adrop of soapy water escaped from the tip of the fingerenlarges itself in the basin in the form of a…
Scientific recreations
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