GLACIAL DRIFT. 2/1 



Fig. 57 represents Great Rock in Wentworth, with Mt. Carr in the distance. Two 

 persons seated upon the summit illustrate the size of the boulder. 



In the west part of Fremont are a great many boulders, each from 12 to 15 feet long. 

 The same is true of many other portions of Rockingham county, as near Windham 

 junction, on Clyde hill, where mention is made of one weighing 500 tons. 



Rocking-Stones. 



When large boulders are left on ledges they may be so evenly bal- 

 anced that a slight effort only is needed to make them oscillate. Such 

 cases as have fallen under my notice are the following : 



On Shirley hill, Goffstown, just east of Uncanoonuc, there are two. 

 One of them is 8 feet high and 42 feet in circumference. The dimen- 

 sions of the other are not stated. With them is a third large stone. 



Governor Prescott speaks of a rocking-stone upon Mt. Pawtuckaway. 

 Seneca A. Ladd, of Meredith village, informs me of the existence near 

 his residence of a small rocking-stone. 



Up Corey hill in Hanover, half a mile east of Dartmouth college, is 

 a rocking-stone 12 feet long, 10 feet wide, 5-^ thick, containing about 480 

 cubic feet. Its of Bethlehem gneiss, and has been transported only a 

 short distance. 



On a high hill, about a mile west of Newport village, is a rocking-stone 

 weighing not far from 25 tons. It is about 9 feet high, egg-shaped, and 

 stands upon its larger end. 



Upon Russell Clifford brook in Warren there is said to be another, of 

 these stones, with a tree growing on the top. 



Boulders on top of high mountains. Those on Mt. Washington have 

 been mentioned ; see page 208. On top of Dixville mountain is a boul- 

 der of hornblende rock 5 feet long. Has travelled several miles. Can- 

 non mountain shows a porphyritic gneiss block 4 feet in all directions, 

 which may have come from Bald mountain, about two miles distant, and 

 been elevated 1650 feet. Mt. Kearsarge exhibits a great many boulders 

 of the same material, 5 feet long, that have been elevated more than 

 those on Cannon. Granite boulders are common on the top of Moosi- 

 lauke ; also, Bethlehem gneiss, Lisbon Huronian, Montalban mica schist^ 

 Coos quartzites, besides the common rocks of the mountain. Of these, 

 the Montalban may have come from the north, Essex county, Vt., forty 

 miles away; the Huronian not necessarily more than twelve miles; 



