508 



H. MOHN. METEOROLOGY. 



INORW. 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 = 1 per cent. 



THE ANNUAL PERIOD. 



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

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



Annual Mean 

 Minimum 

 Maximum 

 Range 



84'5 per cent. 



78-1 October 27 th , and 81-1 April 2 nd . 



94-6 July 19 th , 85'3 February 14 th . 



16-5 



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

 irregular in the winter months. (PL VII. 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. 



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



