What is a contrivance for adjusting or regulating the strength of electrical currents, operating usually by the intercalation of resistance which can be varied at will. Wheatstone. --Rhe`o*stat"ic, a called?

rheostat — A contrivance for adjusting or regulating the strength of electrical currents, operating usually by the intercalation of resistance which can be varied at will. Wheatstone. --Rhe`o*stat"ic, a. (Webster's 1913.)

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