SO^ 



so^ 



70^ 



60" 



V 



^< 

 3 



g 50° 



a 



40° 



S0° 



20" _ 



10" 



50'/o 



— r— 



60% 



70% 



80% 



Colored Hon- contagious 

 United States (1912-1915) 



167 000 deaths 



-5 



»o% 



— ] — 



-10 



-10 



Deaths in Relation to Temperature 

 and Humidity, 



± 



Fig. 7. Climograph of 167,000 Deaths of Negroes in the Cities of the United 



States, 1912-1915. 



(From Huntington's World Power and Evolution. Yale Univ. Press.) 



l[32ol 



