Elementary treatise on electricity and magnetism (1903)
Foster, George Carey, 1835-1919, Joubert, Jules François, 1834-1910. Traité élémentaire d'électricité, Porter, Alfred William, 1863- joint author · London, New York, Longmans, Green, and co. · leaf 554
easurement it is necessary to firststandardise the thermometer by measuringits resistance at two known temperatures,e.g. the usual standard temperatures 0° and 100° C. The temperature corresponding to any intermediateresistance may then be calculated by proportional parts; or, insymbols 100… … 532 TECHNICAL APPLICATIONS [465 the resistance varies according to a parabolic formula. In thiscase we have Bt = ^„ (1 + «f + ^fi), ^i„(, = if„ (1 + 100a + 1002/3), and if P be written for the approximate value of the temperaturegiven by the linear formula lit-Ro _inn «^ + /S^ 100„ - ° =100 whence…
Electricity · Magnetism
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