GLACIO-AQUEOUS ACTION IN NORTH AMERICA. 185 



we begin to ascend the latter, the embossed rocks are quite dis- 

 tinct; and here too are bowlders, most evidently transported, 

 though being of primary rocks, their lithological characters do not 

 determine the place of their origin. Here too, I discovered strise 

 running north thirty degrees west, and south thirty degrees east, 

 corresponding essentially with the general course of striae on the 

 mountains of New Hampshire and Massachusetts. I did not 

 nolice these stria? on ascending the mountain in the forenoon ; 

 but they were distinctly visible when the sun was low in the west 

 Mrs. Hitchcock, who accompanied me in this excursion, took a 

 sketch of the embossed rocks at this place, which is not given 

 here, lest the drawings of this paper should be too much 

 multiplied. 



Near the south foot of Mount Franklin, that is, in the valley 

 between Mount Pleasant and Franklin, is another example of the 

 embossed rocks with bowlders ; a sketch of which is given on 

 PI. VHT, figure o. 



Finally, at the south foot of Mount Washington, near a small 

 pond called the Lake of the Clouds, is a third example of the 

 Roches moiitonnees. It is less distinct than at the other localities, 

 as the rock here is more broken up by frost ; still, it is impossible 

 for a practiced eye not to recognize them. And it ought to be 

 stated that here, aj; at all the other places mentioned above, it is 

 the northwest exposure of the rocks that have been most power- 

 fully acted upon ; proving conclusively that the force was exerted 

 from that direction. 



Capt. Partridge states the Lake of the Clouds to be five thou- 

 sand feet above the ocean : consequently it is about one thousand 

 two hundred feet below the summit of Washington. But can 

 there be any reasonable doubt that the rocks on the summits of 

 all these peaks were once abraded by the same agency, and 

 that, were they in place, they would still exhibit traces of it ? 

 Certainly, it appears to have acted powerfully at the height of 

 five thousand feet ; the highest point yet discovered in our country 

 where it has acted. And it seems to me that the facts detailed 

 lead to the following important conclusions. 



In the first place, the same glacio-aqueous agency that has 

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