A method is described for high resistance measurement which depends essentially on the fact that a small capacitanceC,charged and dischargedntimes per second, is equivalent to a high resistance 1/nCohms if the pulsating current is smoothed by a larger capacitance. Upon placing the ``equivalent high resistance 1/nC'' and unknown high resistanceR,in two arms of a Maxwell bridge, it is shown that at balance,Ris given by the familiar bridge equation:R=(1/nC)R1/R2. The method has been used to check the constancy of several electrolytic resistors three years old. It was found, for a resistance of the order of 108ohms, that no change was detectable within 0.1 percent; for resistors of the order of 1010ohms, a decrease of about 3 percent was noted.