CLIMATE. 



11 



symmetrical disposition of tlie climates is completed by the regular alternation of 

 winds and rains in the zones of Mauritania and the Cape of Good Hope, both 

 belonging to the region of sub-tropical rains, which fall in the respective winters 

 of each hemisphere. Africa is thus disposed from north to south in successive grey 

 and more or less intensely green belts, presenting to the inhabitants of the other 



Fig. 5. — Distribution of the Rainfall in Africa. 

 Scale 1 : 7,500,00a 



[XI 



Under 4 

 Iscbes. 



4 to 20 

 nches. 



20 to 40 

 Inches. 



40 to GO 

 Inches. 



60 to 80 

 Inches. 



80 Tnchea and 

 upwards. 



1,200 Miles. 



planets an aspect perhaps analogous to that offered to our gaze by the parallel 

 cloudy zones round about Jupiter. 



These different zones of moisture, whose limits coincide in several places with 

 the isothermal lines, are develoiDcd across the continent with sufficient regularity 

 to enable M. Chavanne to map them out. Africa is more sharply distributed in 

 distinct regions by its deserts than it could have been by broad arms of the sea. 



