5G2 



PROCEEDINGS OF THE ACADEMY OF 



[Dec, 



AsuLKAN Glacier. 

 Glacier House, British Columbia. 



Changes in Tongue. — The same record of breaking down and reces- 

 sion must be made of this glacier, and indeed the changes noted are 

 more marked than for several years. The right side is melting rapidly, 

 with the result that the stream of ice is becoming narrower. On the 

 left side there is not so much change, owing to the mantle of moraine 

 which retards melting. There is much less ice at the tongue than last 

 year and recession is marked. The general siurface of the ice is rougher 

 and there are many crevasses at the line of plates where last year even 

 slopes were found. The large rock marked in 1899 was found to rest in 

 its original position, though heaped all around with fresh moraine. 

 The distance from this rock on August 15, 1907, to the thin tongue of 

 ice w^as found to be 54 feet 6 inches, showing that amount of recession 

 since last year.^ 



The Flow of Glacier above Tojigue. — On August 15, 1907, the position 

 of the plates laid out on July 13, 1906, was determined, giving the 

 motion of the ice for a period of about thirteen months or 398 days. The 

 results are given in the following table, to which have been added the 

 data obtained in 1906 of the rate of summer motion of the same plates, 

 covering a ten-day interval. 



Motion of 1906 Plates on Surface of Asulkan Glacier, July 13, 1906, to 



August 15, 1907. 



Victoria Glacier. 

 Lake Louise, Alberta, Canada. 

 This glacier was visited on August 8, 1907, during a long period of 



' Compare "Observations made in 1906," Proc. Acad. Nat. Sci. Phila., Decem- 

 ber, 1906, p. 575. 



