on the Geology of New Hampshire. 31 
and bearings from other places. The direction of every vein of 
metalliferons ore, or bed of limestone and soapstone, and the 
course of all the drift strie on the rocks, have been taken by 
means of the compass, while the inclination or dip of all the 
stratified rocks was measured by the clinometer,” &c. 
To this succeeds a theory and description of the primary un- 
stratified rocks, and some notice of the minerals contained in 
them. 
_ We now come to the detailed account of the operations in the 
field during the three years of service. In these, as also the 
labors of the laboratory, Dr. Jackson was assisted by gentlemen 
who had been his pupils, and who appear to have faithfully and 
acceptably performed the duties assigned them. In this connection 
it is pleasant to be able to remark that the author in the work 
before us, as well as in others published by him, has exhibited a 
strong desire to accord to those from whom he has in any manner 
received aid, all that strict justice could require. From Messrs. 
Whitney and Williams, two of the assistants, we have reports 
upon a number of sections which Dr. Jackson gave to their 
charge, and among others one upon the northern corner of the 
State, of which they give the geology and topography. The 
account by them of their journey into this distant and compara- 
tively little known portion of the State, and of their operations 
there, though far too brief, will not be read without interest. To 
it the lovers of the romantic and beautiful in nature will feel in- 
debted for the notice given of the Dixville Notch, which they 
speak of as perhaps surpassing the famous Notch of the White 
Mountains, in picturesque grandeur. 
Camel’s Rump mountain, situated in the line of hotkeys 
that divides New Hampshire from Canada, and one of the highest 
elevations in the State next to those of the White Mountain 
range, was ascended by Messrs, Whitney and Williams, who 
from not being able to find any marks of former visitations, 
judged it the first ascent ever made by white men. Of the view 
presented from the summit they thus speak :— 
* But although the ascent was difficult, we were amply repaid 
by the magnificent extent of the view which was displayed be- 
fore us, as the veil of clouds gradually rolled away before the 
wind, In the north a series of high hills stretching beyond each 
