Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 38
ed.Hence all bodies ought to fall with equalrapidity, regardless of their volume or density.That they do not, must then result from theresistance of the air. This is proved experimentally by the Guineaand Feather Tube, Fig. 26. This is a glass tubeabout two metres long, closed with a brass cap… … *See Section 300. ATTWOODS MACHINE. 29 103. Attwoods Machine. Bodiesfall so rapidly that the time requiredfor their fall cannot be readily deter-mined. Attwoods Machine is em-ployed so to reduce the rate of fallingas to render it measureable, Fig. 27.It consists of a wooden pillar abouteight feet…
Physics
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