Circular of the Bureau of Standards, Masalah 24U.S. Government Printing Office, 1922 |
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Halaman 7
... Photometric Labora- tory . ..Edward P. Hyde If proper black velvet screens are employed on a photometer bench , the leakage of light into the photometer , due to the diffuse reflection from white walls , is shown to be so small as to be ...
... Photometric Labora- tory . ..Edward P. Hyde If proper black velvet screens are employed on a photometer bench , the leakage of light into the photometer , due to the diffuse reflection from white walls , is shown to be so small as to be ...
Halaman 19
... Photometry of Carbon Lamps . .Herbert E. Ives and L. R. Woodhull A tungsten lamp is substituted for the usual carbon comparison lamp in commercial incandescent lamp photometry . Operated at low voltage the tungsten lamp gives a color ...
... Photometry of Carbon Lamps . .Herbert E. Ives and L. R. Woodhull A tungsten lamp is substituted for the usual carbon comparison lamp in commercial incandescent lamp photometry . Operated at low voltage the tungsten lamp gives a color ...
Halaman 24
... Photometric Units and Nomenclature . . . . . . . . . .E . B. Rosa A systematic discussion of the mathematical and physical relations of photometric quantities , and a derivation of some useful formulas . Photo- metric nomenclature is ...
... Photometric Units and Nomenclature . . . . . . . . . .E . B. Rosa A systematic discussion of the mathematical and physical relations of photometric quantities , and a derivation of some useful formulas . Photo- metric nomenclature is ...
Halaman 26
... Photometric Attachment for Spectroscopes .. ... P . G. Nutting For simplicity and convenience the polarization spectrophotometers are far ahead of other types , but have lacked sensibility and precision . In the new form an image of the ...
... Photometric Attachment for Spectroscopes .. ... P . G. Nutting For simplicity and convenience the polarization spectrophotometers are far ahead of other types , but have lacked sensibility and precision . In the new form an image of the ...
Halaman 31
... photometric and spectrophotometric tests of a set of 38 helium tubes made up and operated as shown most advisable by preliminary work . The tubes do not differ measurably in color . In light emission per cm of capillary the average ...
... photometric and spectrophotometric tests of a set of 38 helium tubes made up and operated as shown most advisable by preliminary work . The tubes do not differ measurably in color . In light emission per cm of capillary the average ...
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Istilah dan frasa umum
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
Bagian yang populer
Halaman 98 - AA Klein) Constitution and microstructure of silica brick and changes involved through repeated burnings at high temperatures, US Bur.
Halaman 84 - Special Studies in Electrolysis Mitigation. IV. A Preliminary Report on Electrolysis Mitigation in Elyria, Ohio, with Recommendations for Mitigation...
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.
Halaman 31 - At all stations the logarithmic decrement per complete oscillation in the wave trains emitted by the transmitter shall not exceed two-tenths, except when sending distress signals or signals and messages relating thereto. USE OF STANDARD DISTRESS WAVE Fifth.
Halaman 18 - ... Concentration Cells Henry S. Carhart 166. The Capacity and Phase Difference of Paraffined Paper Condensers as Functions of Temperature and Frequency Frederick W.
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.
Halaman 124 - That reasonable variations shall be permitted and tolerance shall be established by rules and regulations made by the Director of the Bureau of Standards and approved by the Secretary of Commerce.
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...