Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 672
gs. 1572 to 1577 are common cast-iron bends or angles. Figs. 1578 to 1583 are cast-iron branches. The T-branch and crossare objectionable, as the flows from the branches and mains are at right angles,and mutually obstructive; whereas in the Y, especially in the full Y, the flowsare at acute angles…
Mechanical drawing
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