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THE POPULAR SCIENCE MONTHLY 



accompanied by faulting and by a 47^ foot uplift of the coast six 

 miles southwest of Hubbard Glacier, a 17^ foot uplift 4^ miles 

 south of it, a 7| foot uplift four miles east of it, and a depression 

 of the coast in some other places resulted in another sort of change. 

 The prospectors encamped beside the Hubbard Glacier tell us of the 

 great roar of avalanches during and after the shocks in 1899. In 

 1906 Professor Tarr found that several glaciers in this region had 

 advanced a mile or more since we visited them the autumn before 

 (Fig. 13). Only one had so advanced between 1899 and 1905. He has 



Fig. 7. The ice cliff of Hubbard Glacier, between 250 and 300 feet high. 



shown this advance to be due to great avalanches which supplied abnor- 

 mal quantities of snow to the heads of the glaciers during the earth- 

 quakes, resulting, after a delay of several years, in a spasmodic advance. 

 The glacier shown on the map on the right and that on the left of 

 Hubbard Glacier, advanced thus between 1905 and 1906 (Fig. 13). 

 The Hubbard Glacier was unchanged in 1906. It may yet respond to 

 a similar impulse imparted by this glacier flood and advance far into 



