of the carbon the junction of two metals of unequal heat- conducting power, points on the screen, as in Fig. 1, he showed that ordinary soldered together at one end,the other extremities of thebars being connected with a galvanometer, would give rise to electric currents. This is the… … ratus shown in Fig. 2. A iB the mirror from which the re- and intensity of the rayB of heat in the Bpectrum. This is many times itB size. His efforts to induce the Admiralty and flected cone of rays passes,first through a rock Bait window, done by carrying the thermo-electric pile through the spec-…
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