Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 271
Fig. 534. Fig. 535. Fig. 536. Fig. 537 is a double or chain set the wedge is struck and the lewis withdrawn,lewis. For small holes in brick or stone masonry drill a hole and insert a shortpiece of lead pipe and force in a wood-screw of a little larger diameter than thebore of the pipe, or drive a…
Mechanical drawing
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