Well's natural philosophy : for the use of schools, academies and privte students, introducing the latest results of scientific discovery and research ; arranged with special reference to the practical application of physical science to the arts and the experiences of everyday life ; with three hundred and seventy-five engravings (1873)
Wells, David A · New York : Ivison, Blakeman, Taylor and Co. · leaf 101
ain it exerts upon the muscles of the claws, which, in turn, graspthe perch more firmly: consequently, a bhd sits upon its perch with thegreatest ease, and never falls off in sleeping, since the weight of the body isinstrumental in sustaining it. 207. A Compound Lever is a combination Compound Le-… … Fig. 66. An arrangement of compound levers is shown in Fig. 66. Here, by meansof three simple levers, 1 pound may be made to balance 1000; for if the longarm of each of the levers is ten times tlie length of the short one, 1 poundat the end of the first one will exert a force of 10 pounds upon the…
Physics · Science · Technology
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