Discussion on “permeability measurements with alternating current” (Robinson and Ball), and “measurements of maximum values in high-voltage testing” (Sharp and Farmer), Boston, Mass., June 28, 1912. (see proceedings for July and June, 1912)

E. D. Doyle: As has been suggested in the paper by Messrs. Sharp and Farmer, the electrostatic voltmeter should have small leakage losses. If the voltmeter has low insulation resistance, it will not hold its charge but will discharge according to the exponential law