Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 534
Fig. 1238. … n-r-n-i i 1 Fig. 1239. 518 ENGINEERING DRAWING. This is intended not only to turn aside drift, but as an ice-breaker; the ice,moving up the incline, is broken by its own weight. Fig. 1240 is a section of the foundation of the Bismarck bridge, showingthe construction of the inverted caisson, similar…
Mechanical drawing
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