528 



H. MOHN. METEOROLOGY. 



[NORW. POL. EXP. 



Mean for the year 0'151 



Minimum 0'097 November 



Maximum 0'192 August 



Range 0095. 



The march of the probability of precipitation from month to month runs 

 nearly parallel with the march of the amount of cloud. PI. IX. (1 mm. 1 

 = 1 p. c. t). 



WIND-ROSES FOR THE FREQUENCY OF PRECIPITATION. 



The numbers in the following Table are the numbers (smoothed) of cases 

 in which a fall of rain, snow, sleet or hail has been observed with the 

 respective wind in the different months during the drift of Fram. 



1 On Plate IX, cm. should be mm. 



