Circular of the Bureau of Standards, Masalah 24U.S. Government Printing Office, 1922 |
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Halaman 60
... molybdenite . No activity was observed in tellurium , boleite pyrites , silicon , and mixtures of sulphides of lead and antimony . Experiments are described on selenium , platinum , gold leaf , etc. , when used with an audion amplifier ...
... molybdenite . No activity was observed in tellurium , boleite pyrites , silicon , and mixtures of sulphides of lead and antimony . Experiments are described on selenium , platinum , gold leaf , etc. , when used with an audion amplifier ...
Halaman 63
... Molybdenite is conspicuous for its high photoelectrical sensitivity to infra - red rays , ex- tending to 3u , being especially sensitive for radiations at wave lengths λ = 0.73μ , 0.85μ , 1.02μ , and 1.8u . Samples of molybdenite from ...
... Molybdenite is conspicuous for its high photoelectrical sensitivity to infra - red rays , ex- tending to 3u , being especially sensitive for radiations at wave lengths λ = 0.73μ , 0.85μ , 1.02μ , and 1.8u . Samples of molybdenite from ...
Halaman 75
... , and the rate of cooling of the specimen after annealing have far greater influence in this respect . ( Sept. 20 , 1920. ) 37 pp . Price , 10 cents . $ 398 . Positive and Negative Photoelectrical Properties of Molybdenite 75.
... , and the rate of cooling of the specimen after annealing have far greater influence in this respect . ( Sept. 20 , 1920. ) 37 pp . Price , 10 cents . $ 398 . Positive and Negative Photoelectrical Properties of Molybdenite 75.
Halaman 76
... molybdenite , silver sulphide , etc. , as dependent upon temperature as well as magnitude and direction of the current through the crystal . It is shown that for radiation of wave lengths less than 0.7μ the photoelectrical reaction , in ...
... molybdenite , silver sulphide , etc. , as dependent upon temperature as well as magnitude and direction of the current through the crystal . It is shown that for radiation of wave lengths less than 0.7μ the photoelectrical reaction , in ...
Halaman 160
... molybdenite , selenium , and stibnite , S398 . Charges carried by canal rays , S23 . Chart , metric , M3 . Chemical elements , melting points , C35 . glassware , tests , T107 . metallurgy , see Annual reports of the Director . porcelain ...
... molybdenite , selenium , and stibnite , S398 . Charges carried by canal rays , S23 . Chart , metric , M3 . Chemical elements , melting points , C35 . glassware , tests , T107 . metallurgy , see Annual reports of the Director . porcelain ...
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15 cents absorption acid alloys alternating current ammonia analysis Annual reports antenna apparatus Baumé scale Bureau of Standards cadmium calorimeter carbon cell chemical circuits circular clays coaxial coils color commercial concrete condensers constant contains copper curves density described determined Director discussed E. B. Rosa effect electrical electrode electrolysis electromotive force emissivity error experimental formula frequency galvanometer given glass heat hysteresis instrument investigation iron June laboratory lamps linseed oil Louis Cohen magnetic materials mercury metal meters method molybdenite mutual inductance obtained oxide Paint paper gives photometric platinum Portland cement potentiometer Price properties pyrometer radiation reflection resistance resistance thermometer rubber samples scale self-inductance Sept shown silver sodium oxalate solutions specifications spectral spectrum steel tables temperature tests thermometers tion transmission tube tungsten units vanadium vapor various voltage voltameter W. W. Coblentz wave lengths weights and measures wire
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Halaman 139 - Specifications and tolerances for weights and measures,, and weighing and measuring devices, adopted by the eleventh annual conference on the weights and measures of the United States, held at the Bureau of Standards, Washington, DC, May 23-26, 1916, and recommended by the Bureau of Standards for adoption by the several States.
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Halaman 14 - The 20° C temperature coefficient of a sample of copper is given by multiplying the number expressing the per cent conductivity by 0.00394.
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Halaman 9 - Burrows 1 1 8. A Method for Constructing the Natural Scale of Pure Color . . PG Nutting 119. An Approximate Method for the Analysis of EMF. Waves . . PG Agnew 1 20. The Thermoelectric Properties of Tantalum and Tungsten . W . W . Coblentz 121.
Halaman 64 - Relation of the High-Temperature Treatment of High-Speed Steel to Secondary Hardening and Red Hardness...