. A new thermo-electric fluid-meter and hot-wire anemometer. n connectionwith figure 2, where the maximum point is at 260° C,indicating that a small temperature change producesno change in thermal e. m. f. The value 260 C,,therefore, is called the neutral temperature forthose two metals. In the thermoelectric diagram devised byTait, the thermoelectric powers of the metalsreferred to lead (Pb.) are plotted as ordinatesalong a scale of temperatures as abscissae, leadbeing taken as a standard because the Thomson effectin it, is zero. The Thomson effect is explained in alater paragraph. Such a the
. A new thermo-electric fluid-meter and hot-wire anemometer. n connectionwith figure 2, where the maximum point is at 260° C,indicating that a small temperature change producesno change in thermal e. m. f. The value 260 C,,therefore, is called the neutral temperature forthose two metals. In the thermoelectric diagram devised byTait, the thermoelectric powers of the metalsreferred to lead (Pb.) are plotted as ordinatesalong a scale of temperatures as abscissae, leadbeing taken as a standard because the Thomson effectin it, is zero. The Thomson effect is explained in alater paragraph. Such a thermoelectric diagram is shown inCurve Sheet No, 1, where it might be observed thatwithin the limits of the diagram, the variations ofthe thermoelectric powers of the various metals withtemperature changes, are represented by straightlines. The electromotive force of a couple madeup of any two metals is expressed by the areaincluded between the lines of the two metals, andthe ordinates of the temperatures of the junctions. H ::^l >i o c?/ <^/ y ov. ^ 1: ° ^ ? ^ ^ • O ^AG£/. C 7~^£/l MO£i.£^CrA/C O/AG/i/IA^S.
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Keywords: ., bookcentury1900, bookdecade1920, bookidnewthermoele, bookyear1920
