Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 350
legraphy 623 made one twenty-fifth of a turn and that theopening of the calliper has been increased onetwenty-fifth of one-fortieth, or one-thousandthof an inch. Hence, to read the calliper, thenumber of divisions visible on the scale ofthe hub must be multiplied by twenty-five,and the number of… … Vernier is more difficult than the latter. It is, how-ever, occasionally used for measuring thediameters of wires, and a description andillustration are therefore given herewith. On the bar of the instrument is a line ofinches numbered 0, 1, 2, &c., each inch beingdivided into ten parts and…
Electrical engineering
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