TISSUE WEIGHT AND WATER CONTENT. 



concerning the physiological differentiation of the two races to 

 be drawn from the average weights per plant. 



The differences in the average percentage of dry substance 

 vary considerably but it is impossible to state in the absence of 

 probable errors that the ratio differs from class to class. 



The foregoing results for a heritable abnormal race substan 

 tiate the conclusions concerning the association of physiological 

 with morphological differences already drawn from a comparison 

 of variant and normal individuals within the same race. 



