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Scientific American, Vol. 49, No. 7 (August 1883) (1883)

leaf 3

An illustration from Scientific American, Vol. 49, No. 7 (August 1883), 1883, leaf 3
by Mr. Geo. Edward Watson, of Bismark City, the local battery, which contains the coil of the electro-mag- engineer said that in casting steel ingois it is more frequent Montana. The novelty consists in the peculiar form of the net moving the receiver. to have a porous casting in mild steel I ban… … iron specified as '' incapable of con- atmospheric absorption, for in a WATSON'S IMPROVED SLEIGH. siderable hardening," is nevertheless vacuum the intensity would remain capable of very considerable harden- constant. We cannot determine a ing under certain circumstances, such as a sudden cooling…

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