136 DONALDSON. [Vou, 1x: 
Specimens of entire encephala hardened for 41 days in a 
2% solution of bichromate of potash: — 
TABLE 8. 
PERCENTAGE OF PERCENTAGE INCREASE 
SERIAL NuMBER. AVERAGE. 
So.tps. IN WT. AFTER 41 Days. 
108 (Slit) 21.4 39.5 
LOO Manes 20.6 21.0 40.7 
110 (Intact) 20.3 B77. 
CDE ee 19.9 20.1 36.2 
The following Table 9 shows the same relation as regards 
the percentage of solids. In addition it shows that in specti- 
mens whether slit or not, a temperature of 37° C. increases the 
percentage of solids. 
Specimens of entire encephala hardened for 35 days in a 
2% solution of bichromate of potash: — 
TABLE 9. 
SERIAL NuMBER. PERCENTAGE OF SOLIDS. | AVERAGE. 
105 (Slit) 23.3! 
106 °° 21.4 
: 
LOZ aye 207 f an 
102 (Intact) ear! 
10 ss 20. 
3 b 21.0 
10g 25.3 { 
1 These specimens were put for 12 days at a temperature of 37°C. Not 
only do the slit specimens show a larger percentage of solids, but placing the 
specimens both slit and entire, at 37° C., increases the solids and gives the 
greater increase again in the specimens slit. The action of heat was followed in 
the way shown below. 
