Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 487
Fig. 1112. Scale : J = 1 foot.Fig. 1113. In the large Washington sewer the man-hole is constructed on the side ofthe sewer; in the Brooklyn one the aperture of the man-hole comes within theexterior wall. In most sewers it is directly over them. Figs. 1112 and 1113 are section andplan of the…
Mechanical drawing
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