36 



VEGETATION OF THE PEAK DISTRICT 



[CH. 



The lowest readings were registered on October 3rd, 1908, 

 and on January 28th, 1909, when the humidity fell so low as 

 25 per cent, at 750 m. The month of May, 1909, is interesting 

 on account of its low atmospheric humidity in this district. 

 The monthly average at the three altitudes of this month was 

 65 per cent.; and, at 500m., out of the 25 days on which 

 readings were taken, the humidity fell below 60 per cent, on 

 12 days. The number of days on which the atmospheric 

 humidity fell below 60 per cent., and the monthly distribution 

 of these days, are indicated below : 



* The numerator represents the number of days on which the atmospheric 

 humidity fell below 60 per cent., and the denominator the number of days on 

 which observations were taken. 



