458 



HARRY FIELDING REID 



Prince William Sound. — Columbia Glacier advanced 600 feet between 

 August 24, 1909, and July 4, 1910, and at least 132 feet more between the latter 

 date and September 5, 1910. In College Fiord the Harvard, Yale, Radcliffe, 

 Smith, Bryn Mawr, Vassar, Wellesley, and Barnard glaciers were advancing 

 much more actively in 1910 than in 1909, and were destroying forest at their 

 borders, as were the Meares Glacier in Unakwik Inlet, the Harriman, Baker, 

 Roaring, and Cataract glaciers in Harriman Fiord, and the Blackstone Gla- 

 cier in Blackstone Bay. Harvard glacier had advanced 100 to 150 feet, 

 Yale 750 feet, and Harriman 300 feet between 1899 and 1910. Barry and 

 Surprise glaciers in Harriman Fiord retreated 2\ and i| miles respectively 

 from 1899 to 1910, different parts of the Barry retreating 500 to 1,600 feet 

 of this distance between 1909 and 1910. Valdez and Shoup glaciers in eastern 

 Prince William Sound and Nellie Juan Glacier in Port Nellie Juan remained 

 unchanged from 1908 to 1910, as did Chenega, Princeton, and Tiger glaciers 

 in Icy Bay, where there was a six or seven mile retreat between 1787 and 1908, 

 most of it later than 1898. Portage Glacier in Passage Canal had a great 

 advance between 1794 and 1880, filling a pass from Prince William Sound to 

 Cook Inlet to a height of over 1,000 feet, where there was previously a low 

 canoe portage and no glacier. 



Copper River. — Miles Glacier retreated about 1,700 feet from 1900 to 1906 

 and readvanced 1,800 feet from 1906 to 1910. Grinnell Glacier advanced 

 slightly between 1909 and 1910. Different parts of the front of Childs Gla- 

 cier advanced 920 to 1,225 feet between 1909 and June, 1910, in midglacier, 

 where the front is undercut by Copper River. On the north bank of the river 

 where the margin of the glacier ends on the land and was stagnant in 1909, 

 it advanced 1,500 to 1,600 feet up to June 10, 1910, and 204 feet more up to 

 October 5,1910. The glacier front developed lobes so that some parts advanced 

 faster than others. The rates per day through the summer of 1910 were as 

 follows : 



In midglacier there was a relative retreat of the advancing ice front from 

 June to September, while the north border continued to advance strongly, 

 as shown above. This retreat was due to undercuttings during the summer 



