Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 777
the shaft, or .025 inch. If the collaris turned so as to expose the first division on the shaft and thirteendivisions on itself, then the distance which the jaws have openedwill be equal to .025 -(- .013 ^ -038. The Brown & Sharpe gauge, usually abbreviated B. & S., is prob-ably used more… … FIG. 635.—MICROMETER. is that the areas of the cross-sections of the various sizes of wirediminish according to a geometrical progression as the gauge num-ber increases. The ratio in this progression is 1.26, or more accu-rately the cube root of two. From this it follows that when wehave increased…
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