( 689 ) 



TABLE I. Frequencies of the wind. 



Bergen. June. 



In half Beaufort scale-values. 



C 



N 



NNE 



NE 



ENE 



E 



ESE 



SE 



SSE 



S 



SSW 



SW 



WSW 



w 



WNW 

 NW 

 NNW 

 Sum 



261 



261 



59 



6 



6 



3 



13 



4 



24 



40 



115 



56 



25 



9 



98 



99 



190 



246 



993 



30 

 6 

 2 

 2 



1 



3 



16 



54 



39 



10 



2 



26 



24 



51 



418 



384 



29 

 1 



1 



3 



22 



15 



2 



5 



1 



6 



46 



131 



12 

 29 



Sum 



261 



125 



13 



5. In order to apply the formulae (4) to a given set of obser- 

 vations we must compose for each period, e.g. each month, in the 

 first place a table of frequency of direction and velocity, which can 

 be easily done. In Table I such a composition has been given as 



an example. 



Further out of this table have been calculated the products ot 

 these frequencies ƒ with the scale-values R, the latter counted 

 double, so that the products have been expressed in the ordinary 

 Bkufort scale; finally these products have been once again multiplied 

 by the corresponding scale-values (ƒ#') ; in tins simple way we 

 find the sums. 



