Journal of the Franklin Institute; devoted to science and the mechanic arts (1826)
Franklin Institute (Philadelphia, Pa.) · Oxford, Eng. [etc.] Pergamon Press [etc.] · leaf 381
e fixed support and the power must, therefore, be equally engagedin supporting the weight; a weight will therefore be supported equalin force to twice the power. 1 to 2 will then be the ratio of powerto weight in this pulley. We have space only to show the application of the same principle * The… … to one or two of the pulleys with more than one rope, and shall for this purpose select the Spanish burton.We must employ a figure. Taking up these instruments inorder: in the first of them the rope towhich the power is attached must,bythe principle of tension, be stretch-ed equally by the weight…
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