Geology and Mineralogy. 



, „„/ and Du..„ 



Strait to Greenland, we find that the largest body (if land in the 

 northern hemisphere, covered by ice and snow to a depth of not 

 less than 2,<>oo feet, and ai this moment sending down its ice- 

 bergs as far as the Middle Atlantic. From the sixtieth degree of 

 latitude to above the eightieth, this vast area of land is known to 

 be ice-covered, and from the scarcity of the icebergs upon the 

 eastern compared with the western coast of that land, it maybe 

 concluded that the general slope of the surface is to the south- 

 west and in exact direction of the glacial markings ot what is 

 kicwn to have been the course of transported bowlders in North- 

 eastern America. Moreover, if we bear in mind the certainty 

 that during the Glacial period the glaciers moving from the 

 , la„d toward the sea could not have formed de- 

 tached icebergs as now, but must have for the time blocked up all 

 a\, mi. s exc. pi the one of easiest escape for the immense accumu- 

 lations of ice, we may easily assume that this avenue was south- 

 westward acn-s lliitidi America and the northeastern part of the 

 United States. 



Finally, it may be remarked that this view is strongly con- 

 tinued 1,'v comparison of the Scandinavian with the American 

 ..Miti.m to the identity ot the general pue- 

 , marked resen in the propor- 



tion between the extent and other circumstances ot the two areas, 

 and that by allowing due weight to all the evidences 

 support of tl 1 was the source of the glacial 



phenomena of the area in .piestion, we find a probable and rational 

 solution ot a hitherto unsettled problem. ^ T% „ , 



6. Note on the Glacial era; by J.vmes D Daxa.-1 rotessor 

 Torell, in his "' N °T 



America. in our views. It is a pleasure to 



know that we agree in all essential points. No American geol- 

 ogist holds, so far as I know, that "the sou;, 

 fields of North America is to be sought in the Came. 

 lands." In my papers on this subj ! ~ • ■ ( >'■ 



324) and 1873 (V, 204), I was speaking of the "Glacier of New 

 V , England part of the great glacier; 

 and, the' conclusion arrived at was that the glactal scratches 

 over New England, New York, and the r 

 north converae toward an area on the Came 

 hence thai ' New Eng 1 "^ and New lork 



".: -..• ' ■:■:■ '" , ' ■ ' ' 



Canada, of the high land of Northern New England, of Eastern 

 and Western New York, and of - • P™* ° a 



part of the Canada water-shed b »*» vauey 



wardly over New England." I regret that my words were in any 



