SCIENTIFIC SURVEY. 379 



C^miden, one mile S. W. from the village, N. 10^ E. 



Camden, S. E. from village, rocks embossed— force from the direction of Mount 

 Battie. 



Camden, at Lily pond, N. 10° E., and N. W. from Rockport the same. 



Camden, Hosmer pond, N. 10° W. 



Camden, on height of land west of Hosmer pond, N. and S. 



Camden, near Ingraham's Corners, N. and S. 



Camden, mouth of Megunticook river, N. and S. 



Camden, Negro Island, N. 10° AV. 



Lincolnville, west part, N. 20° W. 



Appleton, N. and S., and N. 10° W., two miles apart. 



Belmont, N. 30° W. 



Trenton, N. 10° W. 



Washington county, No. 7, N. 10° W. 



Near Witteguerguagum lake, at Big Falls, N. 30° W. 



Tallmadge, east part, N. 12° W. 



Grand Falls, Alleguash river above Chamberlain lake, N. 50° W. 



Alleguash lake, N. 50° W. 



Cauquomgomoc lake, N. 15° W., andN. 10° W. 



Cauquomgomocsis lake, N. 10° W. 



Black pond, N. 10° E. 



Traces of Ancient Glaciers. 



An example of an ancient glacier in Maine has already been 

 described in our first report on the river St. John. The evidence 

 of its existence has been confirmed the past season, by the discov- 

 ery of other markings above the lake of the Seven Islands. The 

 most convincing proof was found upon the sides of the boundary 

 or the south-M^est branch of the river proper. Several examples 

 of striae running down the valley in a north-east direction were 

 there seen. This course is at right angles to the common direction 

 of the drift striae in the valley of the St. John. 



Upon three other streams also have we discovered glacial mark- 

 ings. First upon the Penobscot. These were seen at the mouth 

 of Rag Muft- stream where the striae run N. 15° W., the force 

 having come from the S. 15° E., or in direct opposition to the 

 drift force, which came from the north and proceeded southerly; in 

 Pittston, where the course is N. 28° W. ; and upon the north-east 

 branch. The evidence in the last two cases does not rest upon the 

 direction of the striae, so much as upon the fact that the striating 

 force must have slid down the valley, following all the turns and 

 windings of the river. 



Secondly upon the Piscataquis river. In Blanchard the valley 



