om platinum foil placed under a glass with seven a cure was effected, with two no effect in the Telegraphic Journal, in 1879, makes the follow- cover without excluding the air, the other having a whatever was produced. The treatment lasted from ing statement: " Unless we shall be fortunate enough… … burner was finally destroyed. Figs. 2 and 3.-MAXIM AND WESTON LAMPS. fie. 1,-£PIS0N LAM?. 11892 SCIENTIFIC AMERICAN, INC.
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