St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 72
ove.The energy of the current is kept up by the heat absorbed,just as it is kept up by chemical adlion in the voltaiccell. 89. Peltier Effect. If an eledlric current be passedthrough pairs of metals, the parts at the jundlion becomeslightly warmer or cooler than before, depending uponthe direcftion… … Fig. 87. pairs are usually joined in series, so that the differentcurrents will help each other by flowing in the same direc-tion. Such combinations are called thermoeledtric piles,or simply thermopiles. Fig 87 shows such an arrangement, in which a largenumber of elements are placed in a small…
Electricity
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