218 CAROLINE M. HOLT 
TABLE 12. SERIES C 
Sick animals 
Females 
Group 1. Three albino rats from a lot of twelve controls for revolving cage 
experiment. At about eighty days all contracted a severe bowel trouble from 
which these three recovered. 
BULBS 
ANIMALS AGE BODY BODY BRAIN pagent 2 PER CENT 
WEIGHT LENGTH WEIGHT WEIGHT packer) 
days gm mm gm gm 
Digs NAS EOC 135 128.5 165 1.607 0.033 2.03 
Vise Ome cea: 135 150.5 180 1.534 0.034 2.24 
bets ss ae em ee 134 157.9 182 1.803 0.082 4.55 
Average females....|.........| 145.6 176 1.648 0.050 3.02 
Males 
Group 2. Two, old, with infected lungs. 
PR eee er teins, os get 70 88 148 1.489 0.019 1.30 
Dal Sota ose A a Ba 70 90 155 1.538 | unequal 
NGS ARIE. es. h tele old 213 202 1.759 | 0.050 2.81 
INGO OS 2 is: Seed es 365 214 195 1.791 0.024 1.35 
Average Numbers 
DE G9) eer! Flin D0 SS 21825 198 1.775 0.037 2.08 
Females 
Group 3. Infected lungs, old age, and in case of No. 20, bad abscesses on liver. 
INO eee ic atch cas ie 340 143.0 173 1.673 0.027 1.63 
Fei ke eee 340 146.1 187 Lol 0.032 1.79 
DUO. lee tia ee hs ass 370 186.0 186 1.687 0.051 3.01 
DO: fees oa ho 240 218.3 ig) 1.794 0.021 1.16 
Average females.... 173.4 186 1.726 0.033 1.89 
d. The sense organs become dulled after prolonged defective 
feeding—the animals respond but slowly to stimulations of 
sound, or light or smell. 
e. Defectively fed animals fail to breed. 
3. The effect of defective feeding on the brain and olfactory 
bulbs is less than upon the rest of the body, but is, nevertheless, 
very marked. The olfactory bulbs are stunted and to a con- 
