OLFACTORY BULBS OF THE ALBINO RAT 229 
TABLE 20. SERIES E 
Final control animals! 
Males 
OLFACTORY 
OLFACTORY BULBS: 
ANIMALS sce | werenr | uenorm | wercnr | 2UEBS | PeR cer 
WEIGHT 
days grams mm. grams grams 
Ming eeeeperse le cc eae EN 8 160 223 202 1.890 0.085 4.51 
Wie aici ara tise: 146 228 202 1.987 0.081 4.06 
1 ee eee ee es 121 203 205 1.825 0.072 3.93 
Dia Sache arte Hetceeela 157 274 218 2.021 0.077 3.81 
Average males....... 232 206 1.931 0.079 4.08 
Females 
lige noticed Sa ae 93 1 172 1.559 0.063 4.03 
Rirtrrticra conic e ty: 124 144 Wee 1.672 0.067 4.03 
Meee cs SOM Saarinen 213 183 187 1.801 0.082 4.56 
Oe ae eee 115 175 188 1.792 0.083 4.62 
Average females...... 157 181 1.706 |. 0.074 4.32 
Average males and 
femalesi.ic: 3.) es 195 194 1.818 0.076 4.20 
Test 
Series A see 99% 98% 103% 
Control ° 
1 Data from stock Albinos used for controls in Defective Feeding Series A 
and again used for comparison here, since the original controls died early in the 
experiment. ~ 
controls, and would indicate an even greater gain in bulb weight 
for the test animals than is indicated in the tables. 
In the same way, we may compare the initial controls for the 
mated test animals and those for Series A used for a standard 
(tables 21 and 22). We find the initial relations practically 
the same as for the group just discusesd. 
In the final results (tables 21 and 22) we see that although 
the test rats were older, with bodies 6 per cent longer, the brains 
were actually 5 per cent lighter in weight. Here again, examina- 
tion of the initial controls suggests that in all probability there 
was not an actual loss of brain weight in the exercised animals. 
