The elements of applied mathematics including kinetics, statics, and hydrostatics (1894)
Jessop, C. M. (Charles Minshall), 1861-1939 · London, New York, G. Bell and Sons; [etc.] · leaf 214
t has descended astepov a distance %tp, in the same time the smaller screw has ascendeda distance 2jr», relatively to the larger one, or descended a distance2jT{p—p), and this is the distance through which resistance is over-come, hence if P is the applied force we have by the principle of work… … T/\
Mechanics
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