COMMUNICATION 
From Lewis C. Beck to the Governor, relative to 
the Geological Survey of the State. 
Neiv-Brunswicky N. J. May 25, 1839. 
To Governor Seward : 
My dear Sir, 
I returned to this place yesterday, and embrace the 
first leisure moment to give you a brief account of my operations in 
connexion v^ith the Geological Survey, since the opening of the 
season. 
Dr. Horton and myself met, at Bergen Hill in Nev^r-Jersey, on the 
18th of April, and after spending three or four days at that place, and 
m the vicinity of Paterson, we entered Rockland county, N. Y. through 
the valley of the Ramapo. My object in this preliminary examination 
in New-Jersey was, to collect specimens of the interesting minerals 
found in the green-stone or trap ranges of that State, and to ascertain 
their true geological associations, that we might have some guide in 
the subsequent examinations of similar ranges in Rockland. 
After visiting all the localities of interest to us in the vicinity of Pear- 
son's, we crossed over to the Hudson and made stops at Tappan slote, 
Nyack, Haverstraw, Grassy Point and Stony Point. By this means, 
we had a good opportunity of studying the minerals of the Palisadoes 
which from Bergen, in New- Jersey, to Grassy Point, form a nearly un- 
broken barrier along the Hudson. In our excursions, we were much 
gratified in finding all the minerals previously obtained in New- Jersey ; 
by which means the catalogue of our New-York minerals will be some- 
what extended. At Stony Point we found several magnesian minerals 
