Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 406
Fig. 909. Fig. 910. Fig. 911. Fig. 912. Figs. 913 and 914 are sections of joints of cylinders of unequal diameters,or surfaces not in line with each other. Figs. 915, 916, and 917 are sections of fire-box legs. … Fig. 913.
Mechanical drawing
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