SOME CURRENT THEORIES 



447 



Grams 



15,000 



10,000 



5,000 



4,000 



3,ooo 



2,000 



1,000 



i 2345 6 780 10 

 Months (birth) 



2 3 



Years after birth 



FIG. 199. Curve of human growth for the embryonic period and the first four 

 years after birth, drawn from the absolute increments of weight in Table XIII: each 

 vertical interval indicated on the axis of ordinates represents an absolute increase of 

 weight of 1,000 grams; on the axis of abscissae the ten short intervals at the left repre- 

 sent the nine months of the embryonic period and the month of birth, and each of 

 the following intervals represents one year. 



