Journal of the Franklin Institute; devoted to science and the mechanic arts (1826)
Franklin Institute (Philadelphia, Pa.) · Oxford, Eng. [etc.] Pergamon Press [etc.] · leaf 651
the shelf under the beamnear each of its ends. An edge of each piece of copper, running trans-versely to the shelf, is turned up at right angles to serve as a supportat such a height that, when one end of the beam, loaded with its fullweight, is resting upon one of them, the other end may be… … The weights, and substance to be weighed, are both applied at thesame end of the beam ; the other end being compensated by a constantcounterpoise ; a peculiar form of scale pan is therefore required. It isconvenient to have three tiers of pans hung in a pyramidal form at asuitable distance from…
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