BRAINS OF EUROPEAN AND AMERICAN RATS COMPARED 75 
TABLE 4 
Mus norvegicus from Paris. Used for direct determination of the weight of the cen- 
tral nervous system 
| 
NUMBER RANGE IN BODY WEIGHT 
Z 7 grams 
IIS See SRO BO ES es SMe I <n a DP | 7 183-328 
Ae TIn GS erento eee Spare ote aw Reet <i heads Poe Oe | 2 154-234 
TABLE 5 
Mus norvegicus albinus from Paris 
NUMBER RANGE IN BODY WEIGHT 
grams 
INTIS sentacidGe he SRE C COA Bans Ml oe an eee 8 86-203 
~ arene ea ate eae eee Caines en, Oe 2 94-109 
TABLE 6 
Mus norvegicus from London 
NUMBER 
VIG Carrer wary to aes Senin wipe tk) 2a. see aa ok iS Cee 51 
JOINS 5 SACs vpn Rend Shae ean, Suen cen ee 45 
RANGE IN BODY WEIGHT 
| 
grams 
72-385 
88-382 
TABLE 7 
Mus norvegicus from London. Used for the direct determination of the weight of the 
central nervous system 
NUMBER RANGE IN BODY WEIGHT 
grams 
SM DEH PSS) aI tg oe em Mao NB i Po Ge S| 5 157-305 
MG TAL GS a5 fs. ccp aoe net ee le ee de tee 4 173-215 
TABLE 8 
Mus norvegicus albinus from London 
NUMBER RANGE IN BODY WEIGHT 
~| 
grams 
NMialestans=- eeeeers APY ey ee ee Pee ei ie. d 5 106-286 
STV S ce ee ees ch orchid she ERE Alico ec ee 5 
150-250 
