overcome gravity. Or push itagainst a wind current, holding it by a reel, andthen let go. If badly balanced, it will fly incircles. their weight a ody of propellfor every ten pou f a vulture gravity.In the air like a butterfly,nents may be easily verified byI fliers here illustrated. PleaseJ the… … Fig. 4 representsrigid, and below the dotted li These experiments show hoiThey prove that heavy bodilight bodies; that a weight isgravity; that ten pounds of ;a motor power equal to one nthat one square foot of curved ■ foot of fl.ity equal to twcthat man can i rfac is efl^ected.soar better thanded…
Aeronautics
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