Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 61
drawinglarger circles. Compasses should have joints in the legs, so that the points,pencil, and pen may be set perpendicular to the planes in which thecircles are described (Fig. 136). Compasses of this general form maybe had in sizes of 3|- to 7 inches. For the measurement and laying offof small…
Mechanical drawing
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