IN a paper read to the Royal Society of Arts on March 7, Mr. J. W. Hyde of the G.E.C. Research Laboratories, Wembley, gave a full account of the working of the new electric discharge lamps. The sodium ...
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IN an article which appeared in NATURE last June the present writer reviewed briefly some of the improvements which had been made and promised in incandescent electric lamps. At the time that article ...
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