74 



TROPICAL CLIMATOLOGY 



tropics, Jousset, however, states that this is only temporary, and disappears 

 after accHmatization. 



Rattray maintained that there was a diminution of capacity when a native 

 of the tropics went to the Temperate Zone, and gave the following table: — 



Condition. \ Race. 



Temperaiure 

 79° F. 



Temperaiure 

 78° F. 



Temperaiure 

 32° F. 



185 

 156 



B. C, aged twenty- 

 one ; height, 5 

 feet 5^ inches 



J. C, aged twenty; 

 height, 5 feet 4, 

 inches 



J. W., aged thirty- 

 one ; height, 5 

 feet 4 inches 



Native of 

 Sierra 

 Leone 



Native of 

 Sierra 

 Leone 



Half-cr s1 < 



210 



174 

 176 



207 

 166 

 162 



He found t:hat the frequency of respiration was slower in the tropics, as is 

 shown in the following table :— 



Climate. 



Mean Shade 

 Temperature . 



Highest 

 Number of 

 Respirations. 



Lowest 

 Number of 



Respirations. 



A verage 

 Number of 

 Respirations. 



1 J r Summer 

 England (winter 



fO u t- 

 Equatoria] J ward . . 

 \ doldrumr | Home- 



y w;ird . . 



62° F. 

 42-25° F. 



78.74° F. 



78-60° F. 



18 

 17-5 



14-5 



15 



13-5 

 15 



12 



15- 68 



16- 50 



12- 74 



13- 74 



Jousset, Plehn, and others controvert Rattray's statement that the respira- 

 tions are slower, believing, on the contrary, that they are augmented before 

 acclimatization . 



This shows clearly that the question is far from settled, and, in fact, requires 

 reinvestigation. 



Effect on Circulation. — Rattray investigated the pulse-rate carefully, and 

 gives the following table : — 



Time. 



Number of 

 Observa- 

 tions. 



Tropics. 



Temperate 

 Zone. 



Lowest. 



Highest. 



Range. 



Average. 



Average. 



9 a.m. 



3 p.m. . . 



9 p.m. . . 



53 

 53 

 49 



66 

 68 

 73 



112 

 108 

 no 



46 

 42 

 37 



86- 4 

 88-8 



87- 3 



91-7 

 88-1 

 90-5 



Averages 



- 









87-5 



90-1 



