234 NAOKI SUGITA 
TABLE 18 
Giving for each individual in Litter H (Series IT) the sex, the age, the observed brain 
weight, percentage of water, and the calculated absolute weight of the solids in the 
brain, compared with the standards for the percentage of water and the mass of 
solids for the brains of the same weight and of the same age. Averages are given 
in the last line. . 
STARVED STANDARD 
hase xe the She For the same age 
: Brain “| Mass of 
No. Sex A : f ’ - 
: = Ee | weight aia solids | Percent- Mase on | Benin Percent-| ass of 
age of | “solids | weight | 22¢°f | ‘solids 
grams | percent| grams | percent| grams | grams | percent| grams 
Ha f 13 0.880} 86.39 | 0.120 | 87.45 | 0.110 |} 1.003 | 85.40 | 0.146 
b f 17 1.024) 84.15 | 0.162 | 85.08 | 0.153 | 1.099 | 83.82 | 0.178 
c f 23 1.135) 82.00 | 0.204 | 83.21 | 0.191 | 1.208 | 81.93 | 0.218 
d f 28 1.166) 80.83 | 0.224 | 82.60 | 0.203 | 1.282 | 80.74 | 0.247 
e m 32 1.215) 80.31 | 0.289 | 81.70 | 0.222 | 1.338 | 80.04 | 0.267 
f f 33 1 101 8O0M2" 70. 219) | 83578") Oel79F | 139) | Or oo | On28a 
g m 43 1.295) 80.24 | 0.256 | 80.51 | 0.252 | 1.468 | 79.32 | 0.304 
Average ..... 28—| 1.117| 82.01 0.203 83.48 | 0.187 | 1.256 | 81.54 | 0.235 
confirmed by the data given in table 16, in which it is clearly 
shown that in the underfed the alcohol-extractives are slightly 
less developed as compared with the standards for the same age. 
‘ 
20. SUMMARY 
1. Young albino rats were experimentally starved throughout 
the suckling period, by one of the following methods: 
Series I. Separation of the young from the nursing mother for 
the maximum time each day. 
Series II. Entrusting one mother with an excessive number of 
young (over seventeen) at the same time and thus reducing the 
amount of milk for each young one. 
Series III. Starving the nursing mother and thus reducing the 
quantity of milk secreted. 
I employed five litters for Series I, two litters for Series I, 
and one litter for Series III; in all forty-six individuals were sub- 
jected to experiment and there were fourteen controls. 
