Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 24
ws.Clamp the screw D and read the vernier. If no slow-motion screw is provided, the jaw is moved with thehand into light contact with the body. Measure with a vernier caliper (1) the diameters of several cylindrical rods, (2) the thicknesses of several sheets of metal, (3) the diameters of several… … Fro. 16. It is so constructed that one complete turn of thescrew moves the end a forward or backward one unit oflength, hence the distance a 6 is determined by thenumber of turns of the screw. The number of complete 1G PHYSICAL SCIENCE. (urns, or full units of length, is indicated by the…
Physics
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