A course of experiments in physical measurement (1897)
Whiting, Harold, d. 1895 · Boston, D.C. Heath and Co. · leaf 608
etimesmade movable (one or both of them). Inthis case, verniers are usually attached, soFig. 287. that the distance between the knife-edgesmay be read by a scale on the shaft de. The zero-reading of the vernier is found by bringing the knife-edges together against a pressure equal to the… … ir267.] THE CHRONOGRAPH. 577 ^ 266. Chronographs. — A chronograph consistsgenerally of a cylindrical drum (A, Fig. 288) rotateduniformly by clock-work. The surface of the drumis coated with lampblack,so that a style (5), at-tached to the armature (c)of a telegraph instrumentmay make a mark upon…
Physics
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