Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 28
Fig. 31. Fig. 32. Bisect the inclination of the given lines A B and C D by the line N 0 ; thisis the centre line of the circles to be inscribed. From a point, P, in this line,draw P B perpendicular to the line A B; and from P describe the circle B D,touching the given lines, and cutting the centre…
Mechanical drawing
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