140 



BIOLOGY OF DEATH 



what crude and, in respect of minor and insignificant 

 details, open to criticism. It is not possible here to go into 

 details as to how the causes of death were combined in 



us. REGISTRATION AREA 1906-10 



ENGLAND AND )NALES I9I4- 



SAO PAULO 1917 



ENDODERM 



MESODERM 



ECTODERM 



Fio. 38. — Diagram showing the percentages of biologically classifiable human mortality 

 resulting from brealcdown of organs developing from the different germ layers. Upper bar 

 of pair gives upper limit of mortality chargeable to ectoderm: lower bar gives lower limit of 

 mortality chargeable to ectoderm. 



making up the final tables. For these details one must 

 refer to the original papers. 



Tables 12 and 13, and Figure 38, give the results for 

 the crude mortality of the U. S. Registration Area, Eng- 

 land and Wales, and Sao Paulo, Brazil. 



