520 GEOLOGICAL SUEVEY OF THE TEEEITOEIES. 



Movement of clouds during the month of June, 



Movement of clouds during the month of July. 



Movement of clouds during the month of August. 



Movement of clouds during the month of Septemher. 



Movement of clouds during the Yelloivsione Lake trip, from July 20 to August 27, inclusive. 



In the column headed "Amount of clear sliy," indicates a sky entirely obscured by clouds ; 10 indi- 

 cates a sky entirely free from clouds, and intermediate numbers the relative proportion of clouds and 

 «l©ar sky. 



We have the following averages : June, commencing on the 10th, 6. 5 ; July, 5. 7 ; August, 6. 1 ; Sep- 

 tember, 7. 1. » 



Days free from cloud: July 10, August 15 and 22, September 4, 5, 9, 10; day of total cloud, Sop- 

 tember 30. 



