NATURAL DEATH, PUBLIC HEALTH 233 



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Fia. 51. — ^Trend of combined death rate from the four causes shown in Figure 52 as compared 

 with the four causes shown in Figure 53. 



to say that the four causes of death in the second group 

 are absolutely of less importance than some of those in 

 the first group, because what we are here discussing 

 is not relative force of mortality from different causes. 



