POSTNATAL GROWTH OF HEART, KIDNEYS, LIVER, AND SPLEEN. 283 



CHARTS. 



The 8 charts which follow were constructed from the data contained in the 

 tables. In these the data from Baltimore and New Orleans are combined. At 

 birth includes still-born, premature, full term and new-born specimens; 1-18 refers 

 to the age in months at the time of death; 2-20 refers to the age in years at the 

 time of death. In chart 5 four curves are shown after the age of 5 years, as ex- 

 plained in the text. 



At - 18 months 

 Birth 



220 yeara 



Cm 



300 



CHART 1. Heart weight and age, white 

 and negro females. 



At 1 - IB months 

 Birth 



2-20y 



CHART 2. Heart weight and age, white 

 and negro males. 



