A text book of elementary mechanics, for the use of colleges and schools (1881)
Dana, Edward Salisbury, 1849-1935 · New York, J. Wiley & sons · leaf 226
, with this second graduation theinstrument is adapted for heavier weightsthan in the first case. A common form of the steelyard is alsoseen in the post-office scales, where theobject to be weighed is placed on a plat-form, and the counterpoise slides alongthe graduated arm. Another very simple… … Fig. 141. its centre of 208 STATICS. [196. gravity directly below the point of suspension C. Ifnow a letter is placed between the springs at B theposition is slightly changed, so that the moment of itsweight is equal to the moment of the weight of theinstrument in its new position. 198. Danish…
Mechanics
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep02muss-436-70.webp)
