254 SURFACE GEOLOGY. 
found in the east part of the town, and two boulders of andalusite schist, 
with coarse and fine crystals, one of them apparently from Carr’s moun- 
tain. These specimens ornament the grounds of the institute, while 
other minerals are exhibited under glass. 
In order to give some idea of the distribution of boulders in the state, 
I will select a few examples, and describe carefully the kinds of rock 
found, their size, probable origin, and distance of transportation. In the 
same connection, other interesting features illustrating the general sub- 
ject may be mentioned incidentally. Some generalizations may follow 
the description of localities. 
Boar’s Heap. 
In the middle of Hampton Beach, a mound of drift about 1300 feet 
long and 45 feet high, rises very conspicuously to view. It is the well 
known Great Boar's Head, visited every summer by thousands of people 
for the enjoyment of sea air and bathing. Though small, it may be re- 
garded as a true lenticular moraine, isolated from all visible connection 
with any other mass of till, by a distance of nearly two miles between the 
nearest points. It has been exposed to the wearing action of the sea 
from time immemorial, and consequently has lost a considerable portion 
of its mass. The clayey portion of the till is washed out, leaving the 
stones, and consequently the former size and shape of the mound is 
clearly indicated at low tide by the remnants. From the extreme point 
of the cliff these boulders extend south-east for 400 feet. Their northern 
limit is about a quarter of a mile north of the Boar’s Head hotel; opposite 
the middle of the cliff the boulders are continuous 120 feet to the fucus 
growth, and a single stone projects out of the water as far again. If the 
hill were restored to its original dimensions, it would probably be 1800 
feet in length by 350 in width, with a course about N. 35° W. It was 
steepest on the south side. Mr. S. H. Dumas, the proprietor of the hotel, 
thinks there has been no wearing away of the hill of any consequence 
for many years. The landing-place for boats on the south side has been 
constructed as it is now for the past forty years. If a new one were 
desired, no change of position would be required; so that the erosion 
on that side has been very inconsiderable. The present slight curve in 
the beach north of the hotel he remembers to have been straight once. 
