Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 694
Fig. 1671. … Fig. 1670. Fig. 1672. generally pointed, but sometimes circular; in the earlier, the angles in whichthe shafts are placed are rectangular; in the latter, the shaft is often mouldedon a chamfer plane—that is, a plane inclined to the face of the wall, generallyat an angle of 45°; often the chamfer…
Mechanical drawing
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