on the Geology of New Hampshire. 29 
ition Cambrian series being found to rest upon them, both in 
Maine on the east and in Vermont on the west, dipping in oppo- 
site directions. Upon these last are found, at more distant points 
from the centre of the anticlinal axis, the Silurian fossiliferous 
rocks, containing similar organic remains. Thus says the report— 
“We find trilobites occur near Lubec in Maine, on the 'Tobique 
river in New Brunswick, and at Clements, Nova Scotia. And in 
New York, the same fossils abound not far from Albany, at Lock- 
port and Trenton falls. Besides the trilobites, we observe also 
the same shells in the rocks of Maine, Nova Scotia and New 
York. This fact seems to indicate that the strata on the north- 
east and southwest sides of this axis belong to the same forma- 
tion, and were deposited under similar circumstances, while the 
primary rocks may be regarded as an immense wedge which 
was driven up from below, separating or disrupting the formerly 
continuous mass of strata.” 
Of the later formations, limited deposits of the tertiary are 
mentioned as occurring near Portsmouth. 
The introductory chapters close with some interesting obser- 
vations upon the diluvium or drift epoch, in which the theory of 
Agassiz is dwelt upon at some length, and facts are stated to show 
that however applicable it may be to some of the phenomena 
presented in the Alps, it is by no means so to those of New Eng- 
land. ‘The grooves or scratches on the rocks, so common every 
where in New England, are stated by the author to be “ better 
marked in Maine than in any other section of the United States,” 
and that they there as elsewhere “cross the mountains with but 
little deflection, and run over extensive table lands where there 
could have been no slope for a glacier to move upon.” ‘The 
course of the general current, according to the observations of 
Dr. Jackson, in Maine, New Hampshire and Rhode Island, was 
from north 15° west to south 15° east, as shown not only by the 
scratches, but by the rock masses which have been borne from 
their original locations and deposited in a southeast direction 
upon other rocks. In view of all that is known of the move- 
ment of diluvium in this country, we cannot but regard the gla- 
cial theory as wholly inadequate to produce the results met with, 
and we think with Dr. Jackson, “that the grooves on the rocks, 
if produced by glaciers, should radiate from our principal moun- 
tain ranges and should be more abundant in their immediate vi- 
