Abstract
1. The resting potential of frogsartorius muscle fibers was determined by m.eans of a compensating method using two micro-electrodes and a current sensitive galvanometer as a null instrument.
2. The mean value of resting potentials immediately after the insertion of the micro-electrode was 86.87±8.28 mV (S. D.)
3. The changes in the resting potential were observed for four hours and it was found that the resting potential was maintained for four hours although it was accompanied by some irregular fluctuaton.
4. From thirteen potentiometric measurements within four hours, the mean resting potential of a fiber was calculated. The value ranged from 72.82 mV to 100.60 mV for ten different fibers and the average value was 88.84±8.35 mV (S. D.).
