During the past month life tests of 115 gas-filled lamps have been started, and the tests of 442 vacuum, 112 gas-filled and 12 carbon lamps have been completed by the Bureau of Standards.
Life tests of incandescent lamps
Journal of the A.I.E.E. ; 43 , 12 ; 1157
1924-12-01
405890 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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