Agassiz.] 386 [October 18, 



icebergs. They are rounded and scratched and must have 

 been carried beneath the glacier. Similar lines of boulders 

 in New England always extend in the direction of the ice 

 scratches on the rocks. He thought this evidence settled the 

 iceberg theory, and that Dr. Reed, of Canaan, had not re- 

 ceived due credit for his observations on this subject. 



Prof. Shaler stated that the boulders in Ohio, Kentucky 

 and the vicinity of Lake Erie, must have been carried over 

 two hundred miles from Crestline Ridge, north of Lake Erie. 



Prof. Agassiz stated that the glacial scratches run obliquely 

 across the Berkshire and Wachusett ranges and trend to the 

 Atlantic, which he thought indicated the former existence of 

 an immense ice-sheet rather than a local Connecticut Valley 

 glacier. This ice sheet, he thought, was not less than ten 

 thousand or twelve thousand feet in thickness. He had 

 traced the glacial marks on the Rocky Mountains to a height 

 of eleven thousand feet, and thought these mountains must 

 have been covered by the ice as well as the New England 

 hills. 



Dr. Chas. T. Jackson remarked in relation to the distance 

 to which boulders had been transported, that rocks containing 

 peculiar andalusite made had been carried from the White 

 Mountains to the Atlantic, and stone walls were built of 

 them in South Berwick, Me. Boulders also had been trans- 

 ported from Kingston, R. I., to the top of Block Island. 



Prof. Agassiz thought that this latter case might be ex- 

 plained by the sea having encroached on the land, since the 

 boulders were deposited on what is now Block Island. 



Mr. F. W. Putnam called the attention of the Society to 

 the destruction of the Museum of the Chicago Academy of 

 Sciences, by the great fire, and proposed the following resolu- 



