508 



H. MOHN. METEOROLOGY. 



NORW. POL. EXP. 



The diurnal period comes out very distinctly in all months except Decem- 

 ber, with a minimum about noon, and a maximum near midnight. The range 

 is greatest in June, and least in February. July has a secondary minimum. 

 For the seasons see PL VII. 1 cm.^ = 1 per cent. 



THE ANNUAL PERIOD. 



The following Table gives the mean relative humidity per cent, for each 

 month (PI. VII. 1 mm. = 1 per cent.). 



Annual Mean 84*5 per cent. 



„ Minimum 781 „ „ October 27*>', and 81-1 April 2"^ 

 „ Maximum 94-6 „ „ July 19t^ „ 85-3 February 14*K 

 „ Range 16-5 „ „ 



The march is very regular in the summer half-year, but somewhat 

 irregular in the winter months. (PI- Vli. Mark errors in May and December). 



WIND-ROSES FOR THE RELATIVE HUMIDITY. 



The figures in the following Tables have been computed in the same 

 manner as the foregoing wind-roses. 



' On PI. VII, 'mm.' has been erroneously written for 'cm.' 



