Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 431
fastened with a set-screw, can easily be shifted on the arm H, as may be found requisite. Therefore,when the wheels R R are kept in their present position by means of the lever J H, it is evident that aweight of 20 lbs. acting upon the pulleys A A at P, will balance another of the same weight at N,…
Mechanical engineering
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