PERCENTAGE OF WATER! CORRECTIONS 311 



In this instance therefore the smaller nervous system (of the 

 female) at a given age has a somewhat higher percentage of water, 

 thus agreeing with the relations found between the small and 

 large nervous systems within each sex at body weights normal to 

 age. 



Taking the male as the standard the relations found for the 

 female are 



Brain weight -0.001 gram = + 0.001 percentage of water 



Spinal cord weight -0.001 gram = + 0.008 percentage of water 



As will be noted these values are close to those for the correction 

 factors within each sex. 



GROWTH IN TERMS OF WATER AND SOLIDS: REFERENCES 



In the body as a whole. Lowrey, '13. Hatai, '17. 



In the larger divisions. Lowrey, '13. 



In Skeleton. Donaldson and Conrow, '19. Lowrey, '13. 



In brain and spinal cord. Corrections and correction factors. Cavazzani and 

 Muzzioli, '12. Donaldson, '10, '11 a, '11 b, '16, '16 a, '16 b. King, '11. Weis- 

 bach, 1868. 



