GROWTH OF THE CEREBRAL CORTEX r3 
TABLE 1 
Showing the sex, body weight and length, tail length and brain weight of the Norway 
rats used in this study (sagittal and frontal sections) accompanied by the averages 
for each brain weight group 
eo 
NO. na SEX BODY WEIGHT BODY LENGTH TAIL LENGTH BRAIN WEIGHT 
grams mm, mm, grams 
NeXT b | Gd) | m 19.8 84 41 1.155 
a | (1) | m 20.8 86 44 1.160 
i (2) | m LAS 85 65 1.175 
19.5 85 50 1.164 
N XII 
NXIIIa | ()| m 35.3 110 66 1.369 
35.3 110 86 1.369 
NeXEV |G). | m 33.1 104 84 1.407 
g | @) | m 37.5 112 88 1.429 
(4) aa 33.8 113 94 1.431 
i (3) | m 36.3 107 86 1.431 
e | (5)| m 43.6 124 108 1.437 
els) ln 36.1 112 87 1.445 
36.7 112 91 1.430 
NXVe m 42.6 122 102 1.517 
e m 66.7 135 114 1.557 
54.7 129 108 1.537 
N XVI a m 74.8 137 1.619 
g m 54.8 130 107 1.632 
e m 56.3 128 105 1.636 
62.0 132 106 1.629 
N XVII e f 81.0 152 120 1.710 
g m 57.0 137 113 1,721 
a f 118.5 172 136 1.738 
¢ f 104.0 164 132 1.788 
90.1 156 125 1.739 
N XVIII ¢ f 136.9 157 147 1.825 
a m 128.1 177 142 1.833 
132.5 167 145 1.829 
N XIX b m 160.7 177 158 1.962 
a f 251.0 210 174 1.981 
205.9 194 166 1.972 
