Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 194
ft F, and upon the outward ends of the rock armsare fastened, forming jaws or dies with curved faces, whichare expected firmly to grip the skelp and bend it a smallamount, depending upon the diameter of the pipe which isto be formed. These dies were made of cast iron, firmlybolted to the rock arms,… … Fifi. 7.SiIKAL-WEU) TUUE MAClIINi:!;
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