GROWTH OF THE CEREBRAL CORTEX 1038 
TABLE 10 
Giving for each individual and for each brain weight group the number of nerve 
cells in 0.001 mm.* of the cerebral cortex, in the lamina pyramidalis and in the 
lamina ganglionaris, and also the number of the ganglion cells only in the same 
volume of the lamina ganglionaris, counted at locality VII in the frontal section, 
as shown in fig. 2. Norway rat 
CORRECIION- NUMBER OF CELLS IN A VOLUME OF CORTEX, 
COEFFICIENT 0.001 mM.3 
GROUP etal W.D Lam. pyramid. Lam. ganglion. Sanit 
in fresh ee e 
eens Ob-_ | Cor- | oOb- | ‘Gor | Ob-. | Cor- 
served | rected | served | rected | served | rected 
grams mune. mum. 
N XI b| 1.155 | 13.00 | 10.00 253 115 170 78 44 20 
a | 1.160 | 12.70 | 9.80) 242 itil 164 76 41 19 
Vole el 2eo0 8.80 271 95 199 69 48 17 
1.163 (1/1.34)8 255 107 178 74 44 19 
N XII 
N XIII a | 1.369 |.13.00 | 9.80 25 96 164 70 45 19 
1.369 (1/1.33)8 225 96 164 70 45 19 
N XIV b} 1.407 | 13.05 | 9.50} 248 94 174 67 46 18 
CN IEA2OE | al3R20) | e9e50) |) 227 85 176 65 48 18 
a | 1-431 | 12.85 | 10.20) 200 100 142 Al 40 20 
AS ets. 400) 10L30 222 101 175 79 47 PA 
e | 1.4387 | 13.25 9.60 225 86 165 63 49 19 
Ne} Tees |) Ts3e8%o) 9.50 230 84 178 65 51 19 
1.430 (1/1 .35)8 225 92 168 68 47 19 
NEXSVica Ie a7 |, 1320) | 9/60) |) 285 90 169 65 52 20 
e | 1.557 | 13.50 | 9.20) 250 79 176 56 58 18 
a | 1.564 | 13.50] 9.80] 208 79 166 63 55 21 
1.546 (1/1.40)8 231 8&3 170 61 55 20 
N XVI a | 1.619 | 13.80) | 10.50 | 203 90 143 63 50 22 
CAA GS2 a leloncON| mos 00) e250 78 159 56 60 20 
ev IE6SGe|P1aesOe|- 9260!) 2 GZ 164 55 57 19 
1.629 (1/1 .40)* 217 80 155 58 56 20 
NEXAFS ego iets s80n) 92700) 23 74 155 54 58 20 
g/l 721 | 13.60 | 10.10 182 75 147 60 54 22 
a | 1.738 | 14.10 | 10.60 190 81 ail 56 54 23 
Cole (SSe lsh oom el Oat 192 73 142 54 53 20 
1.739 | (1/1.87)8 194 NGA 144 56 | 55 | 21 
