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 102
s movable along the notches. The bar is furnished with threahooks, or ringsj on the laigest of which the article to be weighed is alwaysliung. The other hooks serve to support the instrument when it is in use,and the pivot by which they are attached to the bar serves as the fulcrum.The weight, Q,… … It may happen that when the weight Q is moved to the last notch upon thebar B C, that the article P will still preponderate. In tliis case, the steel-yardis held by the hook or ring nearer to A, which hangs down in the figure, andthe steel-yard turned over, it being furnished with two sets of…
Physics · Science · Technology
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