BBAIN AND SPINAL CORD OF RAT. 

 HENRT H. DONA 



mm. 



240 

 220 



BODY LENGTH 



BODY WEIGHT 



J I I I I I I I I 



I I I I I 



J L 



G^s. 20 40 60 80 100 120 140 160 180 200 



To show in the albino rat, the mean values for the body length according to body weight, sexes separated; 



220 240 260 280 300 320 



males, females. The theoretic curve is not drawn, 



as it would confuse the other lines. 



The JonnNAL op CoiipAniTivE Nbceolooy and Psychology. — Vol. XIX, No. 2. 



