GROWTH OF THE SKELETON 



271 



the several parts at birth, the lowest values being found in bones 

 forming the middle segments of the limbs, but very evident 

 differences are found at puberty or somewhat earlier. 



I Mll l lHMH llI 



Growth of Skeleton— Albino Rat 

 Oven dried 



Humerus 



b! 10 



Carpus plus Foot Bones 



300 



350 



ffFFFf 



BODY WEIGHT IN CRAMS 



I II I ! I I M I I I 



400 



450 



Chart 15 Percentage of water in the oven-dried bones of fore limb, on body 

 weight (albino rat). Table 17. 



• Humerus, o Carpus plus foot bones. The graph for the ulna plus radius 

 coincides nearly with that for the carpus, and is therefore omitted. 



r I T E r H 



PERCENTAGE OF WATER 



Growth of Skeleton— Albino Rat 

 Oven dried 



Chart 16 Percentage of water in the oven-dried bones of hind limb, on body 

 weight (albino rat). Table 18. 



• Femur, x Tibia and fibula. O Tarsus and foot bones. 



i % If we compare the percentage of water in the appendicular with 

 that in the entire skeleton (table 15, B), it is seen that after 

 puberty the values for the appendicular skeleton are lower. 

 This implies, of course, that the corresponding values for the axial 



