Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 271
Fig. aij. … 884. Current produced byHeat. If two metals which ex-pand at different rates, as anti-mony and bismuth, be solderedtogether and heated at the junc-tion, Fig. 320, wires passingfrom them to a galvanometerfshow a current by deflectingFig. 320. the needle. If the junction be cooled, the needle is…
Physics
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