Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 471
Fig. ]066. enlarged locks of the Erie Canal, showing one of the upper gates and the side-walls. Fig. 1070 is a cross-section of one of the same locks, showing the cul- 454 ENGINEERING DRAWING. vert in the centre between the locks, used for the supply of the waste of thelower level. The proper… … Fig. 1067. ScAiE : rz =\ foot.
Mechanical drawing
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