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H. MOHN. METEOROLOGY. [2nd. ARC. EXP. FRAM 



The last row for each month gives the means for each hour and 

 for the years of ohservation. For the months January to June, and 

 November and December, these means are the totals divided by 4. But 

 for the months July, August, September and October, the means are 

 weighted means, being computed with the number of days in the last 

 columns as weights. 



The series of means for the different hours show that there is 

 hardly any daily period in the months October to February; but the 

 other months, during which the sun is shining, show a well-defined 

 daily period. The minima and maxima are as follows: 



June has a secondary minimum at 4 p. m. 



The range is greatest in May, and diminishes towards the dark, cold 

 months, when it vanishes. 



