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H. MOHN. METEOROLOGY. [2nd arc. exp. fram 



The following Table shows the number of clear days (c) (mean 

 daily amount of cloud less than 2), and the number of overcast days (o) 

 (amount of cloud upwards of 8). July to October completed by means 

 of the observations on board ship. 



The means for July, August, September and October are weighted 

 means. 



By smoothing the means, and counting the days with a mixed 

 amount oE cloud (2—8), we have the number of clear, mixed and over- 

 cast days. 



The number of clear days has a maximum in January and a mi- 

 nimum in August. 



