Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 476
of asphalt, and a brick pavementover all. A A are the arch-stonesof the bridge. In large works, where thereis considerable length of conduit,receiving reservoirs, within ornear the limits of the city, arenecessary as a precaution to guardagainst accidents which mighthappen to conduit or dam, and… … Fig. 1078.
Mechanical drawing
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