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 



- - 



53.9 



US REGISTRATION AREA 1306 -JO 



ENGLAND AND WALES 1914- 



SAO PAULO J9/7 



ENDOD5RM 



MESODERM 



ECTODEffM 



FIG. 38. Diagram showing the percentages of biologically classifiable human mortality 

 resulting from breakdown 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. 



