156 DONALDSON. [Vou. IX. 
TABLE 32. 
One specimen (Sphyrna zygaena), fresh weight 25.9 grms. Fresh in 21% solu- 
tion of bichromate of potash plus 4 its volume of 95% alcohol. 
Ditto, fresh weight 28.05 grms., allowed to stand about 24 hours. Put in the 
same solution. Mean daily temperature, 18.9° C. 
PERCENTAGE INCREASE. PERCENTAGE INCREASE. 
Time. — Days. 
FRESH. STALE. 
I +21.4 + )2.3 
1.25 27.2 B35 
2.25 28.7 8.1 
95- 33-9 8.3 
B23; 38.5 15.9 
426. 40.2 172 
TABLE’ 33. 
Average of two specimens (Galeus Canis). Average fresh weight 5.6 grms. 
Fresh, in 90% alcohol. 
Time. — Days. 
PERCENTAGE Loss. 
0.9 — 25.5 
2.18 31.9 
7 SS) 
18.45 33-6 
Wigs 338 
338. 37-0 
432. Sage 
The tables show that the bichromate of potash solution and 
the alcohol produce a similar reaction to those obtained from 
the sheep’s brain. 
The influence of post-mortem degeneration is also clear, 
Section III]. — Human Brain. 
The interest of the results obtained on the brain of the 
sheep will largely depend on their applicability to human 
material. In the comparison the following data are employed. 
For the percentage of water we take Thudichum’s figures :— 
Mean for the cortical gray substance = 85.2 
Mean for the white substance, cerebrum = 70.23 
