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Scientific American, Vol. 33, No. 10 (1875) (1875)

leaf 4

An illustration from Scientific American, Vol. 33, No. 10 (1875), 1875, leaf 4
nds are removed from his connected by a crosspiece, C, of aluminum or other metal. body, he will remain perfectly rigid for a minute or two. It The maximum of magnetization starts from the N. and 8. is said that a black line on a white surface will produce the poles, and decreases to the neutral… … This compass is said to be much more sensitive than the the attention upon some bright object. It is by some con- by the wedge, which is again acted upon equally and uni- needle, to be less affected by rolling of the ship, and to be sidered a partial paralyzation of the brain. The same can be…

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