276 Scientific Intelligence. 
weigh upwards of a thousand tons. But many thousand tons from the south 
of it are utterly removed. Going a little further north, we reach one of the 
highest hills in the town, of granite, two hundred and fifty feet. ‘To the north, 
upon a tide “river,” now a mile long; but once three, 
before the land obtained its present height; and earlier still, very much lon- 
Looking around towards the east and south, we glance over a reine 
i 
o 
os 
d examination of the subject during the last few years, I have seen 
nothing to induce me to believe that the granite had been materially changed 
but of less on Meee and transported the farthest off, are more worn and roun- 
clays and sands crushed and ground from the detached rocks. 
On the Taconic slates beyond these mountains, towards Ellsworth, we have 
formation, and the granitic ers are in most wonderful 
_ round one of the quarries to the west of Carver’s harbor, the ground is 
literally covered with boulders, some of which are enormous. After repeated 
attempts, { could not make out more than five per cent of foreign rocks a 
em. i i 
often have little or no evidence as to their origin. We have specimens ot 
red and blue granite, trap, gneiss, mica schists, clay slates, and fossiliferous 
sandstones from the Katahdin region. We can well suppose them to have 
been dispersed by icebergs, or borne as freight to these localities by slowly 
moviiy glaciers, 8) We Rest 
My conclusions, therefore, from the facts which I have enumerated, are, 
that a glacier once filled the basin between the Camden hills on the west, and 
those of Mount Desert on the east, forty miles wide—extended to a great 
tance north, involving several hills beside those mentioned of # thousand 
feet high, and certainly not less than three thousand feet thick. : ; 
eae eae "Very truly yours, 
Jecember, 1862, ws Joun 
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