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Scientific American, Vol. 18, No. 20 (1868) (1868)

leaf 7

An illustration from Scientific American, Vol. 18, No. 20 (1868), 1868, leaf 7
eration. In length and variety so as to have a surface equal in resistance and hardness to probably more than all others combined, has delayed and of work it has scarcely any limit, asingle machine being the best tempered steel, while at the same time having an obstructed the general introduction… … SHAFTS IN PLACE, is a circular base jplate, A, and anjouter and smaller plate, B, most workmen preferring the lathe, or even the vise and file or saw, to the uncertain results of the hand cutting tool. between which is the lever, C, the whole held together and to The annoyance of taking down a…

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