Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 202
Tungsten lamp ofDr. Hans Kuzel. HEWITT LAMP 161 necessary, and this fact joined to the high cost of the carbonslessens the net gain in their use. On another line of experimentnoteworthy results have been reached with metallic oxides.Magnetite, an oxide of iron, has developed a candle-power withbut… … Hewitt mercury-vapor lamp. watt, and it is expected that still higher efficiencies will soon beattained with this wonderful compound. From quite another side Mr. Peter Cooper Hewitt enters thefield of light production, utilizing the glow of a vapor instead ofa solid stick. His lamp is a long,…
Inventions · Inventors
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