GEOLOGICAL SURVEY OF THE TERRITOEIES. 

 Direction of wind for the month of Septeniber. 



519 



Direction of wind during the Yelloivstone Lake trip, from July 20 to August 27, inclusive. 



Note. — In the tables for the direction of the wind, the numbers repre- 

 sent the changes in direction. They are not the sums of the observations 

 of each wind; as, wJiere the same wind is noted several times in succes- 

 sion, it is regarded as one wind, and 1 represents it in the tables. 



Belative force of loind for the month of June. 



