SET-OFFS.

A set-off is nothing more than a double bend, as shown at Fig. 47, and

made in much the same manner. D is the long end of the pipe. Always

make this bend first and pull it up quite square, as it will be found

to go a little back when pulling up the other bend; if you can make

the two together so much the better, as you can then work the stuff

from the throat of one bend into the back of the other. The different

shaped dummies are also here shown: F a round-nosed dummy, G a double

bent dummy, H a single bent, I straight, J hand-dummy, ABN a long bent

dummy shown at Fig. 38.

[Illustration: FIG. 47.]

Scientific American Supplement, No. 315, January 14, 1882 · 第 58 / 122 题