II. SIZE OF THE BODY AND ORGANS 99 



It appears, therefore, that between G 4 and G 10 the various 

 parts of the skeleton show no progressive changes in the 

 characters measured. Whether there has been a lowering 

 of values previous to G 4 our data do not indicate. These 

 parts of the skeleton do show retardations under unfavor- 

 able conditions, and the response can apparently be obtained 

 in rats that are younger than those that show organ changes. 



G! G 63 64 65 00 Q-f Go Qo QIQ 



% d) WEIGHT: (ONE BONE) 



+40 



+30 



+20 



+10 



Albino Stondorda Tobtc 128 



(3 LENGTH 



% b) PERCENTAGE OF WATER 



+zo 



Chart 22 Data on femur: Percentage deviations on body length in captive 

 Grays of, 1) weight; 2) length; 3) percentage of water Albino standard*. 



MEMOIR 14 



