1898—1902. No. 4.] 



THERMAL WIND-ROSES. 



121 



THERMAL WIND-ROSES. 



The wind-rose for the frequency of the different wind-directions 

 shows that the observed number of some directions is so small, that it 

 is not sufficient to give a mean that could fairly show the thermal 

 character of the wind in question. Generally the north wind is by far 

 the most prevalent, and it is only in the months of June, July and 

 August that the other winds are so frequent as to make it worth while 

 to compute thermal wind-roses for them. The result of these compu- 

 tations is shown in the following Table. G indicates the directly-found 

 mean temperatures, and iS the smoothed values. The intermediate 

 directions NNE, ENE, etc., have been distributed among the adjacent 

 principal directions with halt their numbers, and every direction given 

 a weight equal to the ensuing number of observations. 



The way in which the numbers run for July, with the highest 

 temperature with NE, seems to indicate that the observations of 4 years 

 are insufficient to give a fair representation of the thermal wind-rose. 



