ch, through the agency of the ring,I, the flow of current is regulated. When the ring is placedat the end of the handle nearest to the battery cord, the re-sistance is reduced to the minimum, and the current fromthe battery flows freely to the lamp. Sliding the ring to theopposite end of the handle… … ELEGTBIC HOTTTH LAMP AND LABYNGOSCOFE. ling, C. A non-conducting shield, G, is placed over thelamp globe for the double purpose of preventing the radia-tion of heat and of directing the light to any desired point.At H is a screw for breaking the circuit, which should bebroken occasionally during a…
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