under Various Electrical Conditions . 1 5 1 
By this means all effects of the discharge, other than those caused by 
temperature changes, would be eliminated, and any discrepancies between 
the curve obtained in this case and that in No. 98 would be due to stimuli 
other than a rise of temperature. 
In this experiment (No. 99) the curve obtained was almost exactly 
parallel to that obtained in No. 98 (see Fig. 6). The only divergence 
appeared at the last two points, and during these periods the temperature 
of the water-bath, and consequently that of the seeds, did not correspond 
exactly to the readings in No. 99. When these two are corrected the 
discrepancy is even less (Table XII). 
Thus the whole effect of the discharge recorded in No. 98 was obtained 
merely by altering the temperature and in the absence of any other effects 
of the discharge. 
Attempts were now made directly to eliminate the effects of temperature 
by keeping the seeds at a constant temperature during electrification. Three 
methods were adopted (Table XIII): 
1. The respiration chamber was immersed in a water-bath, the tem- 
perature of which was lowered as that of the seeds tended to rise under the 
influence of the discharge. This was found impracticable, owing to the low 
thermal conductivity of the peas (No. 103). 
2. A thick layer of glass wool was superposed upon the seeds to absorb 
the heat evolved, but this was quite ineffectual (No. 104). 
3. The glass-wool layer was supplemented with a layer of peas 
previously killed by prolonged boiling, but this also failed to keep the 
temperature of the live peas at a constant level (No. 105). 
Thus we were unfortunately unable directly to eliminate the effects of 
temperature from the experiments, with a discharge producing relatively 
high currents. 
