206 D. W. Shea — Calibration of an Electrometer. 



volts ; fig. 4, when charge was one hundred and sixty volts ; 

 fig. 5, when charge was two hundred volts ; fig. 6, I, when 



charge was twenty volts, and II, when charge was ten volts. 

 The Roman numerals in the figures refer to the tables. 



