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Scientific American, Vol. 32, No. 15 (1875) (1875)

leaf 3

An illustration from Scientific American, Vol. 32, No. 15 (1875), 1875, leaf 3
which has lately been intro- an ingenious instrument for giving warning of earthquakes, vaporize the alloy to be examined. This takes place very duced in France. It consists of a suitable pedestal on which and also for registering the direction of vibrations of the soon after the current is… … venient in that it admits of economizing space in a shop, To set the apparatus, it is arranged as depicted in the en- the heavens of the observer. It differs from ordinary charts and also of saving ice which would be preserved longer ow- graving, the weight pressing upon the ball just sufficiently…

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