Electricity for public schools and colleges (1891)
Larden, W. (Walter), b. 1855 or 6 · London : Longmans · leaf 285
roti wire are twisted two pieces of copper wire. The ends ofthese latter are con-nected, l^y means ofmercury cups ?n ;«, witha galvanometer G. Thislatter must be delicate,and, on account of thehigher resistance due tothe bad contact of theCu and Fe, it may beof higher resistance thanthe form… … Fc wire CH. XVI. THERMO-ELECTRICITY 259 As B rises in temperature an increasing current is observed ; its directioncan be shown to be from Cu to Fe across the hotter junction. This currentincreases until B is at 260. It then decreases, and becomes zero when B is at500° C., i.e. is zero when /, -T =…
Electricity
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