Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 62
put the feet. 186. The Wedge, Fig. 58, consists of two in-clined planes united by their bases. Hence poweris gained by it in the same way as with the plane-. 187. The wedge is applied in raising weights avery short distance, in splitting wood and stone, Fig. 58. an(j -n Q^gj. cases where great… … 188. The Screw, Fig. 59, is an inclined plane wound
Physics
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