Mesure de Courants Continus Inferieurs a 10 to the Minus 10th Power Ampere et de Resistances de 10 to the 12th Power omega pour Courant Continu (Measurement of Direct Currents of under 10 to the Minus 10th Power Ampere and of Resistances of 10 to the Minus 12th Power omega for a Direct Current)
(Englisch)
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Measurement of weak direct currents by Townsend's method using a vibrating condenser electrometer. Development of a current generator giving a pico-ampere independently of the resistance of the circuit used. Development of generators giving currents which may be adjusted continuously and exactly (0.1 to 1 pico-ampere, 1 to 10 pico-amperes, 10 to 100 pico-amperes). Measurement of very high resistances (10 to the 12th power ohms) by three different methods. Graphs are made by plotting the value of the resistance against the potential difference applied across it (from 50 millivolts to 50 volts). Two methods use adjustable current generators and the third is applicable to the measurement of resistances of between 10 to the 7th power and 10 to the 13th power ohms using a series of condensers ranging from 50 pico-farads to 10 microfarads. (Author)
Mesure de Courants Continus Inferieurs a 10 to the Minus 10th Power Ampere et de Resistances de 10 to the 12th Power omega pour Courant Continu (Measurement of Direct Currents of under 10 to the Minus 10th Power Ampere and of Resistances of 10 to the Minus 12th Power omega for a Direct Current)