Wright.] 54 [December 20, 



by Dr. Hitchcock in 1842. As these similar phenomena thus appear 

 in a line twelve miles long, in a direction coincident with the 

 scratches on the rocks, and are absent both sides of that line, I can- 

 not doubt their common origin. Between Danvers and the sea the 

 ridges are near the sea level, and at several places sections show 

 almost complete stratification. Above Beaver Brook Station the 

 ground is higher, and the few places where I have found fresh sec- 

 tions show little or no stratification." 



I will add here an account furnished me by Mr. Warren Upham 

 of the New Hampshire Geological Survey, regarding other series of 

 what he regards as similar ridges. 



From the Saco River, at Conway, towards Ossipee Lake, along the 

 railroad, and again southeast from Ossipee Lake, along Pine River, 

 and past Pine River Pond and Balch Pond into Acton, Maine, there 

 is a series which Mr. Upham has examined, and which he describes 

 as essentially the same in character with the Merrimack and Andover 

 series. Between Conway and Madison there is a wonderful exhibi- 

 tion of very extensive moraines, full of coarse angular boulders of all 

 sizes, very abundant, with none of the modifying action of water, in 

 ridges, etc., just like kames in arrangement. They occupy the side 

 of the valley and pass by gradual transition to typical kames along 

 the centre of the valley. 



In the Connecticut Valley, Mr. Upham writes, that at Colebrook, 

 1050 feet above the sea, a single ridge is found on the east side of 

 the river, one mile long, 25 to 75 feet high. It is parallel to the river, 

 and runs north and south. Nothing else important of that descrip- 

 tion is found till Wells River is reached, where it is again well 

 shown for one mile. Apparently it was once continuous, but has 

 been cut through by the Connecticut and Wells Rivers. It is, there, 

 in the middle of the valley, and reaches a height of 75-150 feet 

 above the river, or 475-550 feet above the sea. No remnant is again 

 found for more than twenty miles, when it appears again, and is 

 plainly traceable for twenty-four miles from Lyme, N. H., to Wind- 

 sor, Vt., occupying the middle of the valley, which is trough-like, 

 being bounded by high ledgy hill ranges on each side. There the 

 height varies from 100 to 250 feet above the river, or 500 to 600 feet 

 above the sea. The fine alluvial silt of the high plains, by which 

 this kame is sometimes almost covered to the top on both sides, and 

 usually on one side, is shown by superposition, etc., to have been a 

 later deposit. 



