116 



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



THE ANNUAL PERIOD. 



The following Table gives the mean temperature for each month, 

 extracted from the. Tables on pp. 63 — 107 last row for the complete 

 months. The incomplete months — in brackets — are completed by 

 means of the four-hourly observations made on board the Fram when 

 she was under way in the summer months in the straits near the 

 winter quarters, or when there are only four-hourly observations. 



The regular progression of the numbers in the line "Mean" is broken 

 by those for January (too low) and February (too high); and I have 

 therefore smoothed the numbers for the months December to March, as 

 shown in the next line. 



The means in the Table are means for the month. Reducing them 

 to the middle day of the month ^, we obtain the numbers in the last 

 line (Red.). 



o 



The mean for the year is — 17.05. 



Parabolic curves for minimum and maximum give as the 

 Coldest day, January 18*i\ Temperature — 33!3 

 Warmest day, July 15«\ — »— + 3.8 

 Annual range 37.1. 



o 



Mean annual temperature — 17.05 occurs May 1^* and October 12"'. 



Hann. Lehrb. d. Met. p. 99. 



