98 
[Assembly 
the Emmonsite of Thomson. But more of this hereafter. It may, 
however be added here that many of these compounded minerals, and 
which exhibit cleavages, undergo changes by exposure, and they almost 
always effervesce in acids. This, together with the original mixtures 
of minerals, oblige us to discard chemical characters in the present in- 
stance as the ground of specific distinction. 
An interesting locality of fibrous sulphate of barytes occurs in the 
town of Carhsle, about seven miles from the Court-House. The 
fibres are from half an inch to an inch and a half in width. This place 
was visited some years since by Prof. Eaton and he, I believe, first 
pointed out the true nature of the mineral. It is probably in considera- 
ble abundance and it has been proposed as a flux. Near the principal 
layer of sulphate of barytes there is another of the fibrous carbonate 
of lime, arragonite so called. And between these two extremes there 
are intermediate specimens, being mixtures of the two, in various pro- 
portions. 
To the above forms of carbonate of lime, others may be added as 
occurring in this county, viz : calcareous tufa and agaric mineral, the 
last of which might, I should suppose, be used with advantage as a 
fertilizing agent. A specimen of it which I analyzed gave the follow- 
ing results, viz : 
Carbonate of lime, , 97.25 
Organic matter, 1.95 
Silica, 0.80 
Several localities of bog iron ore are noticed here, but none of them 
are of much importance ; there is also a bed of oxide of manganese 
credited to this county, but I have not had an opportunity of examin- 
ing it. 
The frequent occurrence of those rounded masses, called septaria, 
is also to be remarked as one of the features in the mineralogy of Scho- 
harie. They consist, as I have before stated, of an impure carbonate 
of lime with veins or partitions of sulphate of barytes or brown spar, 
running in various directions. They occur on the banks of the Scho- 
harie creek, and are entirely similar in their appearance and in their mi- 
neralogical characters to those found on the shores of Lake Erie. 
Of sulphur springs there are several in this county, one of which is 
in considerable repute, and is interesting in consequence of the deposi- 
