Allen, Charles Ricketson, 1862- [from old catalog] · New York, H. Holt and company · leaf 253
wider than the beam,and deep enough to permit the beam to move freely in a vertical * By Ritchie. 240 APPENDIX C. plane. The projecting ends on each side of the slot are cut in theform of a flat V, with the angle slightly rounded. Pieces ofsheet-brass are fitted to these notches and fastened in… … the beam does not rub against the sides of the slot. Increaseddelicacy could be attained by projecting beyond the support oneend of the knife-edge and attaching to it a long pointer readingon a scale upon the lower part of the post. In using these scalesit would probably be best to weigh by…
Physics
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