137 



Record a : deviation is 3 volt (followed by a series on spontaneous discharges). 



In F. sol. free of 0^ the deviation diiiiiiiishes considerably. After the preparation 

 has been kept for a long time in F. sol. rich in 0^, a repealed discharge follows 

 after one indirect stimulation. 



Ill two otiier experiments in duplicate it ('oiild he sliovvn that also 

 after keeping (he organ in F, sol. which had been saturated with 

 H, and iriore so yet in one with CO^, 0, causes the deviation to 

 increase. 



After this series of experiments another one followed in which 

 the same apparatus was used (Fig. 2). Tlie Fühner's solution, poor 

 in Oj or saturated with, it was here kept at certain definite 

 temperatures by immersing the whole apparatus in a thermostat. 



Experiment 8. 



Organ 1: Temp. 18°. Deviation about 25 volt. Latent period 5,5t. 



After 30 min. Temp 11°. Deviation 24,2 volt. Latent period 6, Sir. 



After 22 min. Temp. 28°. Deviation 0,3 volt. Latent period 4,2o-. 



Organ 2: Temp. 18''. Deviation 20,6 volt. Latent period 6,4cr. 



After 40 minutes : Temp. 30°. Deviation 0,25 volt. Latent period 3,4^-. 



After 26 minutes: Temp. 15°. Deviation >4 volt. Latent period 6,5t. 



Experiment 9. 



Piece of organ of large Torpedo between zinc electrodes, two nerves being 

 intact. Thermometer lies in immediate neighbourhood of organ. Length of nerves 

 15 m m. Distance of stimulating electrodes 3 m.m. 



As mentioned before we can not attribute any absolute value to 

 the volt-values given for the disciiarges, since the galvanometer- 

 records require a correction which can not be calculated very 

 easily. After cooling, however, the string will more easily follow 

 the potential difference, because it develops more slowly in the cold. 



Whatever may be their absolute value we can see easily from 



