/■'LOWERING SEASON AND CLIMATE. 



:m 9 



Ganges and Jumna from these directions, -take their origin. The 

 watershed extends along the northern slope of the numerous groups 

 uf hills known collectively as the Vindhya mountains, and which 

 separate the Gangetic Plain from the Narbada Valley." 1 With re- 

 gard to the climate of the North- West Provinces the cool season comes 

 to an end in March. Strong hot winds setting in from the west last 

 well into May. As they are extremely dry, a humidity as low as 6 per 

 cent, has sometimes been recorded. After the greatest heat at the end 

 of May or the beginning of June, the rainy season sets in during the 

 latter half of J une. It generally does not rain for more than a day or 

 two at a time, and the rains cease usually in September, lasting gene- 

 rally a week or moro longer in the eastern than in the western districts. 

 The cold weather falls begin towards the end of December and last 

 during January and February 2 . Here I add the statistics of the 

 average monthly rainfall of 22 stations which lie within the area of 

 Duthie's flora. 



Rainfall recorded at 22 stations. 



1 Dnthie, Flora of the Upp^r Gangetio Plain and of the adjacent Siwalik and Sub- 

 Himalayan tracts, Vol. I Introduction. 



2 Blanford, 1. c. pages 141—143. 



