Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 488
ntering at an acute angle, as all branches and connections with asewer should. The short lines on the left vertical wall represent sections of jjstaples, built in to serve for a ladder. When the T is at right angles to the through pipe it is very convenient toform the base, as in Fig.* 1114, in…
Mechanical drawing
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