1898-1902. No. 4.] WIND -VELOCITY. DAILY PERIOD. 



227 



WIND. VELOCITY. 



The velocity of the wind was measured at each observation-hour 

 with Mohn's hand-anemometer. Ttie friction-coefficient was 1.0 metre 

 per second. Height of anemometer 6 metres above the sea or ice. The 

 observations made at the winter havens are to be found in the Tables 

 of Wind-Observations, pp. 177 — 221, together with the direction of the 

 wind, and are given in metres per second (reading -|- friction-coefficient). 



WIND-VELOCITY. DAILY PERIOD. 



The following Table gives, for each month and year, the monthly 

 means of the observed wind-velocities for each alternate hour, the daily 

 means for each year, the number of days of observation, and in the 

 last row the weighted means for each hour, showing the daily period. 



January. 



February. 



2.27 



I.7I 



5-77 

 3-95 



3-43 



28 

 28 

 28 

 28 



March. 



31 

 31 

 31 

 31 



1899 



I goo 

 igoi 

 1902 



Mean 



ApriL 



