Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 46
26 ELEMENTS OF DRAWING the scale directly on the drawing in their proper position and thecompass set to them, the latter method being preferable as thereis less chance of injury to the scale division marks. To use the compass hold the handle of the instrument lightlybetween the thumb and the first…
Mechanical drawing
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