308 



H. MOHN. METEOROLOGY. 



[NORW. POL. EXP. 



From these Tables and the diagrams (PI. I. 1 mm. = 1 case), we find 

 the following hours and values of the daily maxima and minima, and of the 

 diurnal range of the frequency of Calms. 



The frequency of calms has its maximum in the early morning hours, 

 and its minimum in the hours about noon or a little later. The period is 

 the reverse of the period of the velocity of the wind, of the frequency of the 

 fresher winds, of the frequency of the monthly maxima of the velocity, and 

 of the frequency of the stronger winds. 



