THE VARIATIONS OF GLACIERS 455 



whole appearance of the reservoirs indicates that the advance in 

 this region will become general. In the southern part of the same 

 massif, although the increase in the snow-fall is also marked, the 

 retreat of the glaciers continues. In the Pyrenees the snow-fall has 

 been heavy since 1906 and the small glaciers show a marked 

 tendency to increase in size. 1 



Swedish Alps. — A number of glaciers have been measured and 

 the changes resulting during a variable number of years up to 1909 

 indicate a slight increase in general, though a few of the glaciers 

 are apparently stationary and one or two slightly retreating. 2 



Norwegian Alps. — -The difference in the behavior of the glaciers 

 of Jotunheim, in the interior of Norway, and those of Folgefon 

 and Jostedalsbra, near the coast, which was commented on in 

 the last report, continues. The glaciers near the coast are generally 

 advancing, whereas those in the interior are generally retreating. 3 



Russia. — -The greater part of the glaciers observed in the Cau- 

 casus between 1899 and 1907 have retreated. A few have remained 

 stationary and only two have made an advance. A number of 

 glaciers in the Altai and Muss-tau mountains, in Siberia, have been 

 visited but no careful measurements made. 4 



REPORT ON THE GLACIERS IN THE UNITED STATES FOR I91O 5 



There are a number of small glaciers in Colorado which, on the 

 whole, show a tendency to become smaller, but their variations 

 from year to year are extremely slight. 6 



The Hallett Glacier shows no measurable change since 1909 

 (Mills). 



The Carbon Glacier on the northern side of Mt. Rainier is in 

 marked recession (Matthes). 



The United States Geological Survey has been continuing its 



1 Report of M. Rabot. 3 Report of M. Oyen. 



2 Report of Professor Hamburg. * Report of Colonel Schokalsky. 



s A synopsis of this report will appear in the Sixteenth Annual Report of the Inter- 

 national Committee. The report on the glaciers of the United States for the year 

 1909 was given in this Journal (XIX, 83-89). 



6 All available information regarding these glaciers has been collected by Judge 

 Junius Henderson, "Extinct and Existing Glaciers of Colorado," University of Colo- 

 rado Studies (1910), VIII, 33-76. 



