Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 469
75 x 7; the Chesapeake and Delaware, 66 x 10; the ship-canalsof Canada, 10 feet deep and from 70 to 190 feet wide. The dimensions for canals for the supply of mills depend—first, on thequantity of water to be delivered. Their area of cross-section should be suchthat the average velocity of flow… … FiG. 1064. main so, to prevent the obstruction from drift and anchor-ice in the water-wheels. The usual depths of the larger canals are from 10 to 15 feet; withsuch depths the cover of ice which reduces the section by the amount of itsthickness does not materially decrease the velocity of flow, nor…
Mechanical drawing
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