GLACIAL DRIFT. 293 



very irregular outlines of the surface ; but wc have been unable to dis- 

 cover this relation or dependence, if any exists. In the northern por- 

 tion of the area explored, the till is common in patches and extended 

 sheets, but forms only few and scattered lenticular hills or slopes. Far- 

 ther south, these remarkable accumulations occur quite abundantly upon 

 three belts of our territory, one of which extends through the west part 

 of Cheshire county ; another, from Goffstown and Weare south-west to 

 New Ipswich and Rindge ; and the third, through eastern Rockingham 

 county. The general features of these lenticular deposits of till, which 

 have been already given, apply to them in all parts of the state where 

 they have been found, and also in north-eastern and central Massachu- 

 setts, leaving little that needs to be particularly mentioned, except the 

 localities of their most conspicuous or noteworthy occurrence. 



Sullivan County. The glacial drift does not form many prominently rounded masses 

 in this part of the state. A lenticular slope of till, resting against higher ledges at the 

 north, was observed two miles west of Meriden on the north side of Blow-me-down 

 brook. Even such deposits are rare in most of the towns of this county. Southv/ard, 

 lenticular accumulations of till were noted on both sides of Sugar river one to two miles 

 east of Claremont. The first of these on the north side of the river falls off abruptly 

 at its south-east end, having evidently been undermined by this stream, which now 

 flows thirty rods distant, separated by a low flood-plain. No lenticular masses were 

 seen in Newport, but considerable till is spread out in flattened sheets. For fully a 

 mile in the west part of this town, beginning a little below Kelleyville, such a deposit 

 has been undermined by Sugar river, and forms a continuous bluff on its north side 75 

 to 100 feet high. The slope southward from Acworth centre to Cold river, amounting 

 to about 500 feet in two miles, is principally covered with till, much of which is massed 

 in rounded hummocks with several lenticular hills near the bottom. At the northward 

 bend of the river, a half mile west of South Acworth, it forms a bluff 100 feet high 

 The ascent on the south side of the valley towards Alstead is also marked by frequent 

 patches of till. 



Cheshire Coimty. In the west and south-east parts of Cheshire county the lenticular 

 hills are finely developed, but they are almost entirely wanting over an intervening area 

 which averages ten miles in width. At East Alstead, and for a mile to the north and 

 east, the surface is mostly till, which occurs in broad swells, resembling lenticular ac- 

 cumulations. Well marked examples of "crag and tail " occur one mile north-east and 

 a mile and a half east-north-east from this village, the latter example being in the edge 

 of Marlow. Many fine lenticular hills occur in the south part of Walpole, scattered 

 among more prominent hills of ledge. At a mile and a half south-east from the village, 

 the road which leads north from school-house No. 4 climbs a rounded slope of till nearly 

 VOL. III. 38 



