Wright, Mark R., 1854- · London : Longmans · leaf 246
Fig. 239. … Fig, 240. end opposite one screw is a pianoforte peg at an angle of 4^°. Oppositethe other two screws are two brass pulleys (window-blind pulleys) on stems 238 Appendix which are driven in at an angle of 45. A bridge—that is, a triangularwedge of hard wood—9 inches long, \ inch wide at base, and as…
Physics
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