90 



50 



Humidity 

 70 



SO 



80 



<D 



H 



50 



O 





 O 



IfO 



20 



United States north of W and east 

 of Missouri River. 



(1900-1912) 

 -2,500,000 deaths. 



10 



Graph 



of 

 New York 



I 



. 15 10 



-5 



5 



FIG. 31. Climograph of the northeastern United States. Based on about 

 2,500,000 deaths in the United States north of 40 latitude and east of 

 the Missouri River, 1900-1912. 



