Scribner's engineers' and mechanics' companion : comprising United States' weights and measures : mensuration of superficies and solids ... the mechanical powers ... steam and the steam engine (1848)
Scribner, J. M · New York : Huntington and Savage · leaf 113
ie.4500-^5=900 lbs.Note. The first cord, B P, is obviously not taken into the account. When more than one Rope is used.In a system of pulleys where the ends of one rope are fastened tothe support and power, and the ends of the other to the lower andupper blocks, the weight is to the power as 4 to… … MECHANICAL CENTERS. These are the centers of gravity, oscillation, percussion, andgyration. CENTER OF GRAVITY. The center of gravity of a body, or any system of bodies con-nected, is a point about which, if suspended, all the parts are inequilibrio.
Mechanical engineering · Weights and measures
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