A system of natural philosophy, designed for the use of schools and academies (1845)
Moffat, J[ohn] M. [from old catalog] · Philadelphia, E. C. Biddle · leaf 80
three characters of a lever assumed in theoretical inves-tigations ? How many orders of levers may be enumerated ? How are the seve-ral orders usually distinguished ? * This simple kind of machinery, known in French by the name ofbascule, has been proposed for various other objects.—See… … 155. In a lever of the first kind, those parts on each side of thefulcrum are termed the arms of the lever; and the greater therelative length of that arm with which the power is connectedcompared with that to which the weight or resistance is attached,with so much stronger effect will the power be…
Physics
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