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Scientific American, New Series, Vol. 3, No. 3 (July 14, 1860) (1860)

leaf 15

An illustration from Scientific American, New Series, Vol. 3, No. 3 (July 14, 1860), 1860, leaf 15
erent kinds of work in forging, movement over the surface of a board than during its outwards to a position that will cause i: to elevate and also to suit the strength of blow required at differ- forward cutting movement, ‘The improvement in bench front portion of the plane stock to a sufficient… … watch springs at 530°, small action of the hammer, whereby it HOWELL'S IMPROVED TRIP-HAMMER. saws at 570°, and large saws at is operated in a superior mantet 590°. Copper-colored. spots are without any jarring. designed to obviate this evil, so that the cutter will not not prodaced by tempering;…

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