Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 29
ver, we see that we have the choice 20 GEARING. between two pairs of wheels, each giving the same velocity ratio, but differing in regard to the direc-tions of the rotations. The choice here is also usually determined by the conditions of the machinein which the wheels are to be used ; we will…
Mechanical engineering -- Dictionaries
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