62 WORLD-POWER AND EVOLUTION 



they increase during the hot weather, decline to an autumn 

 minimum which generally comes in October, and rise again as 

 cold weather comes on. In Massachusetts, where the summers 

 are usually not oppressive for more than a few days at a time. 



Finland 



Massachusetts 

 Rhode Island 



New York City 

 Philadelphia 



Washinsrton D. C 



Japan 



Figure 7. Seasonal Distribution of 

 Deaths in the United States 



The scale for Finland is indicated in 

 percentages of the yearly normal. For all 

 the other curves the scale is the same 

 except that the zero is at a different level. 



the increase in the deathrate in summer is not nearly so great 

 as in winter. As one goes southward, however, the relative harm- 

 fulness of the summer increases until at Washington the warm 

 months are worse than the winter. 



