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Scientific American, Vol. 57, No. 11 (1887) (1887)

leaf 3

An illustration from Scientific American, Vol. 57, No. 11 (1887), 1887, leaf 3
to such an heated, the air forced through a tortuouscourse within delphia, Pa. The cage or holder is hung by gudgeons extent that their extermination is only a question of such body of heated metal .affords.a hot blast, which in a stirrup-like hanger, so that the holder may be may be delivered… … carefully. When he finds that the temperature of the PORTER’S TWINE HOLDER AND LIFTER. mass is what it should be, he digs numerous holes about rod which lifts the slack of the twine, and operates to ing the surrounding parts to the action of the flame by the axis of the mound, and in each one of…

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