Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 78
Fig. 165. Fig. 166. Fig. 167. carried to each angle, and to all the dots on the sides. As in the precedingfigure, slight curves are made on either of the side-lines, and the trefoil isadded to each angle, with the base of the middle leaf touching the transverseworking-lines between the sides.It…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
