Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 527
rd steel base. The girders arestrongly built of plates and angles and cover-plates, and connected to each other byframes and lateral angle bracing. The sizesvary from 40 to 60 feet in length. Figs. 1221, 1222, and 1223 are sectionand details of a turn-table as made by theCreenleaf Manufacturing… … Fig. 1217. ENGINEERING DRAWING. 511
Mechanical drawing
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