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Scientific American, Vol. 42, No. 15 (1880) (1880)
leaf 7
230 Scientific American. [APRIL 10, 1880. lighting was recently exhibited to a few gentlemen in an| perfectly to the glass and metal, is sufficiently elastic to Photometric tests, it is said, have been made with a Sugg It is stated that the seven lamps are operated upon one elec- hour at a cost of… … EXHIBITION OF THE SAWYER ELECTRIC LIGHT. THE NEW SAWYER LAMP. recharging with nitrogen nine and three fifths cents. The | trical circuit, supplied by a single generator transferring four © 1880 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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