504 PROCEEDINGS OF THE ACADEMY OF [1899. 



Many pretty examples of sand cones and glacier tables were to be 

 seen, while the avalanches, which at frequent intervals thundered 

 down the almost perpendicular cliffs of Mts. Lefroy and Victoria, 

 lent an awfulness to the scene truly in keeping with the surround- 

 ings. The lower glacier is almost entirely fed from those hanging 

 on the steep slopes above. 



ASULKAN GLACIER. 



The Asulkan Glacier was visited on the 12th of August, Avhen 

 a picture was taken from the test rock of 1898, and three boul- 

 ders marked to determine in future the position of the tongue. A 

 search was made for the rocks marked by Mr. H. W. Topham 

 without result. Changes in the deposits about the glacier have 

 evidently taken place rapidly, and it is probable the rocks marked 

 by him have been covered up by fresh material. 



The tongue of ice seems to be slowly receding from the moraine, 

 as noted last year,' and it was possible to locate the limit of the 

 ice quite accurately. In order to fix its position on the above 

 date, a line, passing through three rocks and the tongue, was chosen, 

 the magnetic bearing of which was 85° 35' E. The rocks mark- 

 ing the two ends of this line were situated, one on the small mo- 

 raine just to the left of the glacier, and the other on the high 

 and stable moraine to the right, while the third and smallest rock 

 lay just below and to the right of the tongue. Bearings Avere 

 taken to locate these rocks with other pi-ominent objects. 



The changes which have taken place in the glacier during the 

 year are not marked. A comparison of the test pictures of 1898 

 and 1899 shows a slight shrinkage in the height and a very slight 

 increase in the breadth, while the position of the tongue has not 

 changed to an appreciable extent. The ice fall about three- 

 eighths of a mile above the tongue, where a series of exquisite 

 seracs is to be seen, is visibly less than last year, and the neve 

 line is much lower. The hanging glaciers to the west, on the sides 

 of Mts. Castor and Pollux, are more active, and we noted a 

 number of pretty avalanches. These seemed to be very infre- 

 quent last year. 



» Proc. Acad. Nat. Set. Phila., 1899, p. 124. Also Plate VI. 



