Compton, Alfred G. (Alfred George), 1835-1913 · New York : J. Wiley & Sons · leaf 147
133 FILING, eral, have two such sets of grooves, and are called double-cut." The first cuts are made as already- described, and the second, which are not quite so deep, cross these, as sliow^n in the lower part of … Fig. 74. the figure, being inclined to the axis in a direction opposite to the first, at an angle of from 75° to 85°. The wide chisels of the first cut are thus divided into a large number of small-pointed teeth. The teeth of any one row being pushed across the
Metal-work
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