CHAPTER III. 

 THE PHASES OF LIFE. 



712. THE child has at birth, on an average, rather less 

 than one-third the maximum length, and about one-twentieth 

 the maximum weight, to which in future years it will attain. 



The composition of the body of the new-born babe, as com- 

 pared with that of the adult, will be seen from the following 

 table, in which the details are more full than those given in 

 413 ; the figures in brackets are more recent observations. 



Weight of organ in percentage 

 of Body-weight. 



Eye 

 Brain 



Kidneys 

 Skin " 

 Liver 

 Heart 



Lungs 

 Skeleton 

 Muscles, &c. 

 Testicle 



2-16 

 16-7 



2-01 

 15-35 



-037 



-08 



Weight of organ in 

 adult, as compared 

 with that of new-born 

 babe taken as 1. 



1-7 



3-7 (3-34) 

 12 

 12 



13-6(11-05) 

 15 (12-1) 



20 



26 



. I 48 



60 



It will be observed that the brain and eyes are, relatively 

 to the whole body-weight, very much larger in the babe than 

 in the adult. This disproportion is a very marked embryonic 

 feature, and has a morphological or phylogenic, as well as a 

 physiological or teleological, significance. Inasmuch as the 

 smaller body has relatively the larger surface, the skin is natur- 

 ally proportionately greater in the babe ; but the same dispro- 

 portion is observed in the kidneys, these like the skin increasing 



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