Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity (1854)
Davis, Daniel · Boston : Palmer and Hall · leaf 84
, an electrical current would flow fromone to the other. Thus, if the ends of two wires,or strips of German silver and brass, are made totouch each other, or are brazed together, and thejunction heated, a current will flow from the Germansilver to the brass, if the free extremities of the wiresare… … B the German silver, and B the brass; the direction ofthe current being indicated by the arrows. 107. In thermo-electricity, as in galvanism, in-stead of two metals, one metal, in diflerent con- 68 Daviss manual. aitions, can be used to excite a current. Thusmerely twisting the middle of an iron or…
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