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Scientific American, Vol. 66, No. 22 (1892) (1892)
leaf 9
btain a continuous illumination bright enough to read by. This light is accompanied The first such apparatus of this kind emanated from server. by no perceptible heat, and is seemingly produced Very favorable reports on the results of such inves- Vienna, where they were executed in 1883 by the… … ing method at pre- sent is that by which rary. © 1892 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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