Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 316
30 to 100volts. The mercury vapor in the tube gives off a brightlight that is deficient in the longer wave-lengths, or red. Thelack of the longer wave-lengths results in an unpleasantdistortion of color. The lamp may be started by tilting the tube, it being nor-mally at an angle to the horizontal,… … Fig. 246 ing allowed to return to its normal position. A spark may becaused to pass through the tube, due to the action of an in-duction or kick coil which ruptures the medium and startsthe lamp. A third means of starting is to place an auxiliarypositive electrode near the negative electrode to be…
Electrical engineering
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