390 



H. MOHN. METEOROLOGY. 



[NORW. POL. EXP. 



In order to find a formula for the diurnal period of the pressure of the 

 air for the different months, the number designated by D. f. m. in the fore- 

 going tables have been treated by harmonic analysis. The formulae are given 

 below. In the following table Ihe numbers D. f. m. are designated by 0, 

 the numbers computed from the formula by G, and their difference by G. 

 For the months in which the Fram was drifting in the ice in high latitudes, I 

 have taken the means of 3 (or 2) years. August and September, 1893, 

 during which the Fram sailed along the Siberian Coast, have been treaded 

 separately. 



