GLACIAL DRIFT. 295 



Carroll County. The lenticular accumulations of till which have been observed east 

 of Lake Winnipiseogee lie most frequently on the north-west side of hills, which was 

 struck by the full force of the ice-current. The hill upon which Sandwich Lower Cor- 

 ner is built may serve as an example. The north side of this hill is a smooth lenticu- 

 lar slope of till, but ledge appears at its top and on its south side. Fernald's hill in 

 Tuftonborough, a mile east of Melvin Village, also has a very regular north and north- 

 west slope of till. A bed of stratified gravel and sand occurs in the lower till of this 

 deposit, as shown by wells at Mr. Calvin Fernald's, described on page 290. The high- 

 est point of this hill is ledge, which forms all its south-east side, being in many places 

 precipitous. A similar mass of lower till, with modified drift beneath or enclosed in 

 it, lies on the north-west side of a hill two miles north-east of Wolfeborough village. 

 Pray hill, north of Pine River pond in Wakefield, has a fine north-west slope of till, 

 while its south-east slope is ledge. Fogg's Ridge, one mile south of Pocket hill in 

 Ossipee, is the only true lenticular hill seen in Carroll county. This is a typical exam- 

 ple, showing no ledges for 100 feet below its highest point. Its whole north-west and 

 north slopes appear to be composed of till ; on the south and south-east, ledges form 

 the base of the hill, extending half way to its top. Its trend, like that of the slopes 

 of till, is approximately north-west to south-east. 



Belknap Comity. The till south and west of Lake Winnipiseogee is sometimes ac- 

 cumulated deeply on the north-west slopes of hills, as in Carroll county, but more 

 commonly it is massed on the south-east or sheltered side. Prospect hill in Alton, and 

 Ayers hill in the edge of Barnstead, four miles farther west, are fine examples of "crag 

 and tail," the till lying only upon their south-east sides, having, in the first case, a very 

 straight slope, and in the latter a rounded, lenticular form. Similar masses of till rest 

 upon the south and south-east sides of HalPs hill, one mile north-east of Gilmanton 

 Iron Works. Several small lenticular hills occur near Half Moon pond, which is 

 crossed by the line between Alton and Barnstead ; others were noted five miles farther 

 south, near Clark's corner; and a fine example lies three fourths of a mile south-east of 

 Lower Gilmanton. Far the greater part of these townships, however, are destitute of 

 any such deposits ; and in the remainder of the county, towards the north-west, lentic- 

 ular hills and slopes are still more rare. 



Merrimack County. The lenticular accumulations of till are well shown in several 

 of the towns of this county. They are most numerous from Pittsfield westward to the 

 Merrimack river. Farther west, typical hills of this class are very rare ; but we occa- 

 sionally find massive lenticular slopes, or broad, flattened swells, of till. The north, 

 west, and south-east portions of this county have scarcely any examples of these de- 

 posits. 



In Pittsfield, the north-west slope of Tilton hill, two miles east of the village, con- 

 sists of three rounded masses of till, but ledges form its top and east side. Much 

 glacial drift is accumulated west of the Suncook in this town and the north part of 

 Chichester, forming lenticular hills, of which Perkins's, Prospect, Jenness, Leavitt, and 

 Brown's hills are good examples. Two of these hills occur in Loudon north of Rollins 



