Fig. 5.—Six Glower Lamp—Out Door Type. together with its high efficiency, commend the Nernstlamp strongly to the lighting world. Depending asit does solely upon the heating power of the current,it can be used on circuits of 3,000 alternations. This … Fig-. 3.—Parts of the Single Glower Lamp. more than any other fact will cause it to displace thearc lamp. The incandescent filament is a non-conductor ata low temperature, and therefore some device mustbe employed to raise its temperature before current can pass through it. Accordingly, a platinum…
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