A catalogue of philosophical, astronomical, chemical and electrical apparatus (1846)
Wightman, Joseph M. (Joseph Milner), 1812-1885 · Boston : Printed by Samuel N. Dickinson & Co. · leaf 12
ed. Being in detached parts, the teacher has no more before, his class than he desires at the time. The Pulleys and Levers are of Brass, and all have Brass counterpoises or Pow- ers. The weights are of japanned iron, to distinguish them from the Powers. All of thcin arc. graduated and marked with… … Above is shown a part of a new Set of Mechanicals of medium size, larger and more complete than those of No. 31. The Set in- cludes Simple and Compound Levers; Metal Screw and Nut; Inclined Piano; Carriage and Weight; and Wedge ; pulleys are also attached to the frame to illustrate the Funicular…
Scientific apparatus and instruments · Wightman, Joseph M. (Joseph Milner), 1812-1885
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