46 
[Assembly 
most useful minerals were analyzed. The third annual report exhibits 
the state of this part of the work at the close of that year. 
During the last year my attention has been principally, though not 
exclusively, confined to the same object. With the valuable assistance 
of Dr. Horton, who has constantly accompanied me, and whose servi- 
ces I cannot too highly appreciate, I have visited many of those coun- 
ties which are known to possess useful or interesting mineral produc- 
tions. The counties in which we have thus to a greater or lesser 
extent made collections, are Rockland, Orange, Putnam, Dutchess, 
Greene, Schoharie, Saratoga, Schenectady, Lewis, Jefferson, and St. 
Lawrence. Brief notices of my operations have been from time to time 
communicated to your Excellency. I take pleasure in stating that we 
almost every where met with gentlemen who were interested in the 
objects of the Survey and who rendered us important aid. I feel it my 
duty thus publicly to acknowledge my obligations to the Messrs. Pear- 
son of Ramapo, Rockland county. Dr. Green, of Canterbury, Orange 
covmty, John Gebhard and John Gebhard, Jun. Esqs, of Schoharie, 
Dr. Allen, of Saratoga Springs, Mr. T. Conklin, of Martinsburgh, 
Lewis county, Dr. Briggs, of Ox Bow, Jefferson county. Dr. Sher- 
man, of Rossie, and E. Dodge Esq., of Gouverneur, St. Lawrence 
county. 
Upwards of three thousand specimens of minerals have been obtain- 
ed by us for the use of the State during the past year, and these, 
together witii the collections previously made, are ready to be arranged 
as soon as a proper room and cases shall have been provided for them. 
There are several other counties which I had hoped more fully to ex- 
plore, and which would have greatly extended the collection, but as it 
is now understood that the active operations of the Survey will cease 
about the first of July next, 1 shall be obliged to devote myself princi- 
pally to the completion of the chemical examinations which I propose 
to make, and to arranging the materials which have already accumu- 
lated, into the form necessary for the final report. 
In this report I propose to give a brief and general view of the mi- 
neralogy of the State in reference to its geography. I shall afterwards 
give an outline of the mineralogy of each county so far as it is at pre- 
sent known ; and in an appendix shall add some notices of new or inte- 
resting minerals found during the progress of the Survey. 
It is an important part of the history of mineral substances to deter- 
mine the manner in which they occur on the surface of the earth, their 
