Jamison, Alpha Pierce. [from old catalog] · New York, J. Wiley & sons; · leaf 100
each side, and with a center at B and a radius, R, equal to thedistance from B to Y (the middle point of the opposite side of therhombus) draw the arc Y-Y (the long one), then with the pointO as a center, and with the same or equal radius, O-Y, describe
Mechanical drawing
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