188 NAOKI SUGITA 
TABLE 3—Continued 
TAIL LENGTH BODY WEIGHT 
SERIES, LITTER AND TEST i AVER- BODY Standard Sta adard 
GROUP CONTROL SES AGE AGE| LENGTH Obe accord- Ob- accord- 
served is = s ¥ served ia ae 
length length 
days mm. mm. mm. grams grams 
Series III | 
G a-g ghee 4m, 3f 11+ 63.0 32.9 Bom 8.3 8.8 
h-j AUS ME PPA roa, Tt 22— Ua) 48.7 46.7 13.0 Aaa 
Series II y 
Ha aT I i 13 63.0 33.0 34.7 8.8 OE 
b-g AUS OE |) ysan, 2bral x0 81.7 64.0 53.8 Le oP TEP oll 
Average } sega tS | GS | SR cy S22 8.6 
«(Series I-II1) 4b; Ju 21+ 79.0 54.5 61.2 14.9 Gra 
Average \ Cli S642 32 esa ORO 9.4 
(Series I) (Oe) IO 19+ 91.8 61.7 65.8 24.8 yt, 
‘ 
5. BODY WEIGHT AND BRAIN WEIGHT 
Table 4 was condensed from table 4a (unpublished), which 
gives data for each individual in this study, and shows for each 
group, in the three series, the sexes, average age, average duration 
of starvation (denoted by percentage value of the hours of iso- 
lation), and the observed body and brain weights, accompanied 
by the average values for the group of the individual standard 
weights, for the same ages, and of the individual standard brain 
weights for the same ages and for the same body weights. For 
the calculation of the standard values for each individual the sex 
was regarded, because in body and brain weights the sex differ- 
ence is clear (‘The Rat,’ Donaldson, ’15). The average differ- 
ences of the observed values from the standards are given for each 
group in percentage, the standards being taken, respectively, 
as the norms for comparison. 
A glance at the table reveals three differences which are clearly 
marked: 
1. The underfed rats have, as a rule, body weights consider- 
ably less than the standard values for the same age. 
