392 



H. MOHN. METEOROLOGY. 



[noRW. POL. EXP. 



The formula is, t reckoned from Midnight: 



c = «! . sin (Ai + ^) + «2 • sin [A^ + 2 <) + ^3 • sin (A^ -\- 3 t). 

 The constants found are 



Taking the means for the dark season, for the sunny season, for the equi- 

 noctial months, and for the year, we obtain 



