GLACIAL DRIFT. 221 



last named town the courses are S. 12°, 15°, and 22° E., the greatest 

 easting being in the valley on Bean's hill, near the south boundary line. 

 The courses in Webster would not vary essentially from those in Salis- 

 bury. 



The Pemigcwasset below Asliland. Local glaciation probably reaches 

 from the mouth of this stream at Franklin all the way to Newfound lake 

 and up Cockermouth brook in Hebron and Groton. At the outlet of 

 Webster lake the course is S. 32° E., which may represent the normal 

 direction to the west of the Pemigewasset. North of Franklin village 

 the direction is S. 27° E. This continues uniform for three miles ; and 

 the grooves and embossment are remarkably w^ell developed near J. W. 

 Simonds's. At this point there is a conspicuous bend in the course of 

 the valley ; and the striae are observed to change their direction to con- 

 form with the topography. At S. Pike's, a mile beyond Simonds's, the 

 striae point S. 42° E. From here to Hill the valley broadens, and the 

 ledges are covered by sand. At the east side of the river, in the north- 

 east edge of Franklin, the course is S. 22° E. down the valley, and the 

 accompanying embossments are admirable. This locality is opposite to 

 the first named examples below the prominent bend in the river. 



On the Sanbornton side of the valley, between Hill and Bristol, there 

 are ledges which have their stoss sides marked from the north, and they 

 probably present other illustrations of the local action. Our table con- 

 tains several observations of south-east striag down the valley of Cocker- 

 mouth brook in Groton. The east side of the lake shows other striae, 

 however, pointing up hill, and therefore having no connection with the 

 local glacier. 



There are examples of a local sliding in New Hampton and Bridge- 

 water. These are all connected with the Pemigewasset movement, and 

 are mentioned in the tabular list. 



The Lower Merrimack. Several points may be made about the lower 

 Merrimack movement. The general direction of the valley is S. 15° E., 

 so that striae varying ten degrees from this on either side may be regarded 

 as belonging to this special glacier. From Franklin to Massachusetts we 

 have, in order, S. i5°-27° E.; Canterbury, i5°-40°; Boscawen, i7°-27°; 

 Concord, 9°-ii°-2i°; Hooksett, i6°-26°; Manchester, i5°-26°; London- 

 derry, ii°-2i°; Souhegan village, 16°; Nashua, 11°; and in Hudson an 

 VOL. Ill, 29 



