Electricity experimentally and practically applied; a book for the beginner and for the practical man, principles, experiments, practical applications and problems (1910)
Ashe, Sydney Whitmore · New York, D. Van Nostrand company · leaf 236
ts fila-ment. Tantalum and tungsten have lower melting pointsthan carbon, but they have higher evaporatiojt points andso can be operated at higher temperatures. The Moore Vacuum Tube. — Physiologically the mostsatisfactory illuminant is that which will cause the leastharm to the eyes. This… … Fig. 276. —Moore Tube. inch of dijfiising sur-face, being 0.66 candlepower per square inch,corresponding to 12candle power per linearfoot of tube. TheMoore tube gives outa soft diffused lightclosely resembling daylight when the tube is filled with nitro-gen, and having a light red, orange, or…
Electricity · Electrical engineering
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