Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 355
A A A AA A A AA A A A D-^ Fig. 746. Fig. 747. Fig. 748. Fig. 749. .o; Fig. 750. Fig. 751. handle to be square, and of uniform width on one side of the lever and a taperon the other, as shown, of about Y i^i 4 feet on each side. The sides of thesquare at the handle to be ^ \/ length in inches, or…
Mechanical drawing
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