ma2 DONALDSON. [VoL. IX. 
the hemiencephala from the same animal being kept under 
similar conditions. 
Each hemiencephalon was put in 400 c.c. of the 2% 
bichromate of potash solution and allowed to harden. The 
temperature conditions are given in Table 5. 
TABLE 5. 
PERCENTAGE INCREASE IN WEIGHT. 
TEMPERATURE. 
AFTER 5 Days. |AFTER 12 Days.| AFTER 36 Days.|AFTER 54 Days. 
I 24.5 2251 Binz 22s 
1’ 22.6 ZVe2 20.2 21.0 
38°C. 2 A 24.9 23.4 22.4 22.0 
2 25-2 22.6 20.9 23.3 
24.3 2258) 21-2 21.9 
( i] 
3 27,55 32.1 32.9 2.5 
34 26.8 30.9 30.4 30.3 
°C. s 28.8 34.2 36.0 34.8 
4 30.2 33-8 30:2 35-1 
28.3 32-7 33-9 33-1 
( 
5 27.0 33-0 35-7 28.1? 
5 25-3 31.2 33-5 32-4 
1° Ge . 25-7 32-5 35:6 33-4 
6 26.4 30.7 B2.2 32.2 
26.1 31.8 34.2 32.6 
The examination of Table 5 shows that at the end of 54 
days the specimens at 38° C. have gained less in weight than 
the other groups ; that the groups at 17° C. and at 10° C. act 
practically in the same way, since no significance is to be 
attached to the differences between them. It is to be noted 
that there is a slight decrease in weight in the two groups last 
mentioned between the 36th and the 54th days. We shall 
1 At the end of 36 days, Specimen 1 was continued for 18 days at 10° C. 
2 Specimen 5 was in the same way continued for 18 days at 38° C. 
