No. 200.J 
9 
parts of the county. I also visited several beds of yellow ochre a few 
miles from the residence of the Hon. Francis Seger, who accompanied 
me to those localities, and to whom I am indebted for several facts con- 
cerning the mineralogy of this, hitherto, almost unexplored portion of 
the State. 
Near Martinsburgh and Lowville, are several veins of sulphuret of 
lead, in the limestone, which 1here constitutes the rock formation. 
Some of these have already been worked, at least to a moderate extent, 
but I believe without profit. Yet the conclusion is perhaps warranted 
by the facts, that important veins of this ore will hereafter be disco- 
vered in the vicinity. 
While at Martinsburgh, Mr. Conklin, of that place, informed me of 
the existence of a bed of black oxide of manganese, a few miles dis- 
tant. On visiting it with that gentleman, we found the locality in 
question on the summit of Tug hill, about two miles from the village 
of Houseville. The deposit of the ore is in marshy ground, and varies 
in depth, as at present exposed, from three or four, to eight inches, be- 
ing made up of rounded masses of various sizes. It is somewhat 
doubtful whether this bed is an extensive one; but the value of the ore, 
and the purity of the specimens which we obtained, certainly warrant 
further and more extensive examinations. 
I have, during the past season, visited the counties of Orange, West- 
chester, Albany, Oneida, Lewis, Madison, Onondaga, Cayuga, Wayne, 
Monroe, Livingston, Genesee, Niagara, Erie and Chautauque: and have 
collected several hundred specimens illustrative of their mineralogy, 
which are ready to be arranged as soon as a proper place shall have 
been provided for them. 
Although I have thus been from time to time collecting materials for 
the final work on the mineralogy of the State, my attention, since the 
date of my former report, has been chiefly directed to the study of our 
mineral springs, of which I now propose to give a general and con- 
densed account. And as the design of these reports seem to be to in- 
form the public of the progress of the different departments of the sur- 
vey, and to illustrate the utility of the undertaking, I have also intro- 
duced some remarks on subjects of practical importance. In short, my 
object has been to show, so far at least as this department is concerned, 
the benefits which may be expected to result from the thorough exami- 
nation of the State, now in the course of prosecution. 
f Assem, No. 200.J 2 
