Bartlett, W. H. C. (William Holms Chambers), 1804-1893 · New York : Barnes · leaf 46
insupposing they preserve unim-paired for a long time their elasticity, may be, and indeedare, used in practice, for thispurpose. Of such is the springbalance, a sketch of which isgiven in the figure. In usingthis instrument, it is necessaryto determine previously theaccuracy of its divisions… … Verification of thr>elasticity. §32.—It is known from observation that the action variation in forceof the force of gravity diminishes as the bodies upon °.^.^ J^^atewhich it is exerted are elevated above the surface of limits.the earth. The same body, therefore, which will cause byits weight a…
Mechanics · Acoustics · Optics
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