i74 Carlisle Mineral. 
‘derstand that Prof. Dewey was of the same opmion. In 
the mean time, Prof. Cooper, of Philadelphia, who at first 
believed the mineral to be sulphat of strontian, wrote me an 
account of experiments, which had induced him to change 
his opinion ; but it does not appear from his letter, or from 
Dr. MacNeven’s mention of his own results in his atomic 
theory, that either of these gentlemen was acquainted with 
my opinion and analysis, which were communicated only 
to my classes, and by letters to a few friends ;* or with Dr. 
Torrey’s analysis, read before the New-York Lyceum early 
in the present year. Prof. Hare writes me that he finds 
the mineral to be sulphat of barytes, so that now there is 
no difference of opinion respecting it. 
In an extract from the minutes of the Troy Lyceum, 
forwarded to me by their Secretary, the following facts are 
stated on the authority of Mr. Eaton. 
“ The fibrous sulphat of barytes is found in the town of 
Carlisle, Schoharie county, about eight miles in a N. W. 
direction from the Court-house, three miles W. of the 
Schoharie Kill, three miles S. W. from Sloan’s Village, and 
thirty-four miles W. of Albany. 
It is inthe N. E. face of a hill, which is about seventy 
or eighty feet high, and three-fourths of a mile in extent. 
The hill crosses the farms of Jacob Dickinson, Andrew 
Griffin, and Abraham Mosier. 
Geological Position.—The fibres of the mineral are ver- 
tical, and in length from half an inch to two inches, standing 
between the layers of a soft argillaceous slate. By the 
lateral adhesion of the fibres, very extensive strata are 
formed. As fragments are found in the soil on the side of 
the hill through its whole extent, there can be little doubt 
that the strata of this mineral are as extensive as the hili 
itself. The rock in which it 1s imbedded is overlaid with 
compact limestone, which contains impressions of shells, 
mostly Bece mites. 
* T refrained from mentioning my opinion and experiments in this Jour- 
nal, because I had and still have reason to believe that there isa real 
sulphat of strontian found farther west in the State of New-York, and think- 
ing it possible that some of the gentlemen had Cress the two, I waited 
for further information —Hdit. 
