212 SURFACE GEOLOGY. 



at Marlborough. In Massachusetts they are S. 20° W. on the summit 

 of Mt. Pocumtuc, 1,888 feet above the sea; S. 50° W. at Granville, 1,240 

 feet. In Connecticut, according to Prof. Dana, there are striae proceed- 

 ing S. 30° W. on Mt. Carmel, and S. 33° W. half a mile west of Alling- 

 town on the Milford turnpike, a few miles west of New Haven. 



South-East Direction. 



The south-east course is well-nigh universal. All over Coos county 

 and about the White Mountains there is scarcely any variation from it 

 upon the high ground. It is the most common in the lower part of Car- 

 roll, Strafford, east part of Merrimack, east part of Rockingham, and on 

 the isolated mountains of the Monadnock type everywhere. In Belknap 

 and the west part of Rockingham the course averages a little less east- 

 erly than south-east. The Winnipiseogee Lake neighborhood is much 

 the same. In all the regions showing a west of south course are many 

 cases of this south-east grooving. About Madison we have noted S. 22° 

 E. The Strafford hills indicate S. 35°-78° E. In the Connecticut val- 

 ley numerous examples are given. We find in Lancaster, S. 23° E.; at 

 Haverhill, S. 21° E.; at Newbury, Vt, S. 23° E.; at East Lisbon, S. 28° 

 E.; in Bethlehem, S. 28° E.; in Piermont, S. 42° E.; in Lyme, as high as 

 S. 31° E.; in Hanover, S. 38° and 51° E.; in Lebanon, S. 51° E.; in En- 

 field, S. i6°-6i° E., but most commonly about S. 22° E. A full descrip- 

 tion has been given already of the remarkable eastings in Claremont. 

 At Unity the course S. 51° E. occurs, and S. 61° E. at Hinsdale. Along 

 the Connecticut-Merrimack water-shed the direction is commonly be- 

 tween S. 20° and 40° E. These south-east courses in this valley must 

 not be confounded with those conforming to the direction of its contour, 

 about to be mentioned. 



The universality of a south-east course among the striae shows that 

 this was the most common direction taken by the ice in its southerly 

 movement. All other directions are exceptional, and probably produced 

 subsequently by an action differently directed. 



Valley Movements, 



To this class I refer all those examples of striation where the ice 

 seems to have followed the topographical contour of the country, includ- 



