202 GROWTH OF ORGANS 



Formula (53) gives the cranial capacity for the body weight 

 a useful datum in many instances. 



Spinal cord weight on body weight. In the case of the spinal 

 cord, the computation was made for the sexes combined by the 

 aid of formula (54). Here again there is a difference according 

 to sex, the male spinal cord exceeding the female by 0.2 per cent, 

 and the value for both sexes combined, by 0.1 per cent. Cor- 

 rections similar to those applied to the brain have been made 

 in this case also. Chart (31) gives the graph for the male spinal 

 cord on body weight and the corresponding graph (male) for 

 the Albino (see chart 9) is also drawn for comparison. 



Formula (55) gives the spinal cord weight (sexes combined) 

 on the brain weight sexes combined, table 85. 



2. Weight-length ratios. In table 86 are given the values 

 for the Norway obtained by dividing the body weight by the 

 body length, as these appear in table 85. 



The explanation of the use of this table has been given on 

 p. 72 in connection with the corresponding table 48 for the 

 Albino. 



GROWTH OF ORGANS IN RELATION TO BODY LENGTH! REFERENCES 

 Donaldson, '12, '12 a. Donaldson and Hatai, '11. 



