392 



H. MOHN. METEOROLOGY. 



[norw. POL. EXP. 



The formula is, t reckoned from Midnight: 



c = »! . sin {Ai + <) + ^2 • sin (^2 + 2 + <*3 • sin (J 3 + 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 



