SIZE OF cerebrum: wild NORWAY 



361 



Fig. 12 



Fig. 12 Dorsal view of the Norway rat brain weighing 1.64 grams — enlargecl 

 1.8 diameters. To show the positions at which the two measurements for the 

 width and the two measurements for the length were taken. 



Fig. 13 Lateral view of the Norway rat brain weighing 1.64 grams — enlarged 

 1.8 diameters. To show the position at which the height was measured. 



Q9 10 11 12 13 U 15 It. 17 IS 19 20 21 22 V> f 



W.D. 

 h.G. 



-< L.F. 

 •-« Ht. 



Chart 65 Giving the average values of the five diameters of the Norway rat 

 cerebrum for each brain weight group. See legend, Chart 7. 



(a) Comparison with Albino. The first records in table 193 are 

 for brains weighing 1.16 grams from animals approximately 



