55° 



ZONES AND REGIONS [Pt. Ill, Sect. II 



DISTRIBUTION OF RAINFALL IN PERCENTAGES OF THE ANNUAL 

 AMOUNT IN THE RUSSIAN STEPPE COMPARED WITH CENTRAL 

 EUROPE. (Intermediate Climate.) 



(After Woeikof, Bd. I, p. 391.) 



DURATION OF THE DRY SEASON IN THE RUSSIAN STEPPE. 



(After Woeikof, Bd. II, p. 257.) 



a, mean duration in days of the interval between two falls of rain ; b, mean duration 



of a sequence of rainy days. 



Orange, in the shrub-climate of the Mediterranean, is given for comparison, in 

 order to exhibit the weaker'distribution of the summer precipitation. 



