TABLE 2 
Showing the observed and corrected values of the area of the cerebral cortex and of 
the total frontal section and the percentage of the cortical area to the total frontal 
section of the albino rat brain, accompanied by the data for the correction-coeffi- 
cient in the individual cases and the correction-coefficient for the group. W. D 
ts the frontal diameter of the cerebrum 
GROUP 
lo) 
Ila 
b 
c 
d 
e 
(Birth) 
Illa 
b 
g 
Cc 
1 
“IVb 
OBSERVED 
BRAIN 
WEIGHT rentat 
ete: Oe 
grams mm.? mm.2 
0.153 2.8 9.2 
0.154] 2.6 8.2 
0.177 3.5 9.9 
0.161 3.0 Sl, 
0.213 4.4 13.0 
0.221 3.6 11.9 
0.261 4.6 13.0 
0.271 4.4,{ 138.1 
0.288 4.1 11.8 
0.251 4.2 12.6 
Orsi 5.1 15.3 
0.322 5.1 13.0 
0.374 Mees 19.0 
0.390 6.5 15.9 
0.395 7.5 17.8 
0.358 6.3 16.2 
0.400 als) 19.4 
0.402 6.8 UG 37/ 
0.420 6.7 17.9 
0.448 8.0 19.0 
0.459 6.9 17.2 
0.466 9.4 21.8 
0.432 TG 18.7 
0.501 9.0 22.3 
0.525 9.8 22.4 
0.528 8.7 19.6 
0.534 7.6 18.6 
0.537 8.8 20.1 
0.555 9.9 22.5 
0.558 9.2 20.0 
0.564 10.2 22.9 
0.579 10.1 221 
0.542 9.3 421.2 
‘CORFFICIENT CORRECTED 
W.D Area of 
in fresh | "oy side | of cortex | total 
mm. mm. mm.2 mm .2 
6.45| 5.65| 3.7 | 12.0 
6.35| 5.40| 3.6 | 11.4 
6.95| 6.26] 43 | 12.2 
Bae 3.9 | 11.9 
g.40| 7.35| 5.7 | 17.0 
7.95| 6.50| 5.4 | 17.8 
780) 7.10-|) aes 18.7 
7.75| 6.80| 5.7 | 16.9 
8.55| 7.05| 6.0 | 17.4 
1.162 5.7 | 17.0 
8.50| 7.65] 63 | 18.9 
8.70| 6.80| 8.3 | 21.2 
8.95| 8.40] 8.2 | 21.6 
8.85| 7.60| 88 | 21.5 
9.10] 8.60} 8.4 | 20.0 
1.18% 8.0 | 20.6 
9.00| 8.50] 8.5 | 21.7 
9.10| 7.90) 9.0 | 22.2 
9.00) 815| 82 | 21.8 
9.15| 8.40/ 9.4 | 223 
9.50 7.95|. 9.8 | 24.5 
9.30| 9.25] 9.5 | 221 
1.10: 9.1 | 28.4 
9.80| 9.20] 10.2 | 25.3 
9.65/ 9.10] 11.0 | 25.2 
9.90] 8.60) 11.5 | 26.0 
10.30] 8.25] 11.4 | 29.0 
10.00] 8.80] 11.4 | 26.0 
9.90 9.00] 12.0 | 27.2 
10.00| 8.55] 12.6 | 27.4 
10.10 9.15} 12.4 | 28.0 
10.10} 9.05] 12.8 | 27.6 
1.182 11.7 | 26.9 
69 
PERCENT- 
AGE OF 
CORTICAL 
AREA IN 
TOTAL 
° SECTION 
per cent 
34 
34 
30 
35 
