380 



GROWTH IN WATER AND SOLIDS 



For Norways trapped in Philadelphia and killed shortly after 

 capture, we obtain, according to body weight, sexes combined, 

 the percentage values of water in brain and spinal cord which are 

 given in table 211. 



TABLE 211 



Giving the percentage of water in the brain and spinal cord of the Norway rat accord- 

 ing to body weight (sexes combined). Based on Donaldson and Hatai, '11, tables 

 11 and 14 



A comparison of the values for the Norways and Albinos shows 

 that the percentage of water in the Norways tends to run above 

 that in the Albinos being +0.37 per cent for the brain and +0.73 

 per cent for the spinal cord. 



