Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 190
of theheating effect of an electrical current, as well as of an electro-magnet, we mention it here. The method of lighting is very much the same as in themercury vapor lamp. To light it, the carbons must touch,allowing the current to flow through them. Then the car-bons must be pulled apart,… … 180 HEATING EFFECT OF CURRENT
Physics
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