The International Bureau of Weights and Measures, 1875-1975: Translation of the BIPM Centennial Volume, Volume 13Chester Hall Page, Paul Vigoureux |
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absolute absorption adopted ampere atomic balance base quantities base units beam BIPM Bureau of Weights calibration candela cavity cells centimetre CGPM chamber check standards CIPM comparator Consultative Committee corner reflector corresponding counting dards defined definition detector determination difference distance electric units electromagnetic electromotive force electrons emission emitted energy etalon exposure Figure flux density frequency fringes function International Bureau international comparisons International System ionizing radiations Kilogram krypton lamp laser length lines luminous flux luminous intensity m/s² magnetic mass means ment mercury method Metre Convention Metric System metrology microscopes mirror national laboratories neutron source obtained optical Paris particles Pavillon de Breteuil permits photoelectric photometry photons platform platinum platinum-iridium precision pressure prototype kilogram pulses radionuclides ratio realized reference relative resistance saturated absorption scale sensor spectral stability stan surements System of Units temperature thermometer tion uncertainty unit system verification wavelength Weights and Measures
Popular passages
Page 139 - The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 meter apart in vacuum, would produce between these conductors a force equal to 2 X 10"7 newton per meter of length.
Page 226 - Affairs, his Envoy Extraordinary and Minister Plenipotentiary at Paris. His Majesty the King of Italy: His Excellency Count Nigra, his Ambassador at Vienna, Senator of the Kingdom; Count A.
Page 139 - The volt is the difference of electric potential between two points of a conducting wire carrying a constant current of 1 ampere, when the power dissipated between these points is equal to 1 watt.
Page 225 - His Majesty the King of Roumania; His Majesty the Emperor of all the Russias; His Majesty the King...
Page 77 - The metre is the length equal to 1 650 763.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2p,0 and 5d5 of the krypton-86 atom.
Page 226 - Commander of His Orders of St. Maurice and St. Lazarus, and of the Crown of Italy...
Page 128 - The kelvin, unit of thermodynamic temperature, is the fraction 1/273.16 of the thermodynamic temperature of the triple point of water (13th CGPM, 1967).
Page 163 - New Apparatus at the National Bureau of Standards for Absolute Capacitance Measurement, IRE Trans.
Page 225 - Knight of the Order of the Elephant, of the Order of the Annunciation, of the Black Eagle, and of the Red Eagle, of the Seraphim, of St.
Page 139 - The ohm is the electric resistance between two points of a conductor when a constant difference of potential of...