Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 44
ompassis used in drawing circles andarcs of circles. A complete com-pass outfit (see Fig. 2 2) consists offive parts: (i) the head piece;(2) the needle point; (3) thepencil leg; (4) the pen leg;(5) the extension bar. The instrument may be madeof iron, brass, steel, aluminum,or German silver, the…
Mechanical drawing
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