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Scientific American, Vol. 56, No. 24 (1887) (1887)
leaf 7
s, are selected, one of them to be used as a of the fingers with the rods. This simple lamp has IT has been computed that the death rate of the tangent screw for driving the wooden disk, the other been found very useful in experiments in connection globe is 67 a minute, 97,790 a day, and 35,639,885… … Fig. 1 SIMPLE ARC LAMP, © 1887 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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