TABLE 17 
Giving for each litter group in this study the average age, the sex, the brain weight— 
body weight ratio, compared with the same ratio for the standard rat of the same 
age and sex. The difference of the ratio for each group is given in the last column 
of the table. This table was condensed from table 17a (unpublished) for the indi- 
vidual cases. At the foot of the table the averages for the test and control groups 
are given. 
terete (The same | pIFFER- 
Se GLone: AND tae state al SEX aneen TO par eed pret cs 
WEIGHT same age STANDARD 
days per cent per cent per cent 
Series I ; 
AY ed asd, at A eel ee See 7.9 6.5 1.4 
h 405 JU 15 AL Gi 7.4 (iss +1.1 
b, e, g OFM 8 3m 6.4 6. —0.4 
i (On JUL 17 ii Am? Qxil —1.9 
Series I 
Bare, est Ai, | ato, We 8.7 Gad, +2.0 
1 40 iu! 19 1m 8.3 Oe i 
b, d Cr 6 Pent 7.6 6.5 +1.1 
oe hy 1 Cr it 18— ont One 6.0 —0.3 
Series I 
Ca, c,d 4u5 JU 20 Demeter Cath 5.8 +1.9 
b,e Car 22 2f one B58 —0.2 
Series I 
Da,c,d Ts i 12— |1m, 2f 183 6.8 +4.5 
aLe 4Ue Us 18 lm 8.4 6.2 +2.2 
b Cm 9 1m 7.8 (fel +0.7 
f Cail 22 lm bal 5 —0.5 
Series I 
Ea, b, c,d ARE 12— |}3m,1f 8.6 6.8 +1.8 
g, h ahs 08 20 Det 7.0 5.6 +1.4 
emt Cy Ju 17— tim, i O26 6.4 —0.8 
Series II 
F a, b Basle 13— IL sons 1 i 9.1 6 +2.3 
c-] 405 JU 25+ |4m, 6f as Sil. +2.4 
Series III 
G a-g 4A dE 11+ |4m, 3f 10.3 6.9 +3.4 
h-j ahs 1 22 |e tr lak 9.3 O20 +3.8 
Average } Pl ere 9.3 6.8 +2.5 
(Ser. I-IIT) AMS TUL 21+ vans) 5.8 +2.1 
Average } Cor 8— 7.3 6.8 +0.5 
(Ser. I) (Os 101 19+ One 5.9 —0.7 
