176 Sidero-graphite-—Fetid fluor Spar. 
ters tothis object. Two or three days since one of the lat- 
tme a handful of coal, found in this range, on 
Deep River, in Chatham county, about twenty miles south 
of this place. The coal is highly bituminous, and burns 
with a very clear and bright flame. It is reported that a 
sufficient quantity has already been found to afford an ample 
supply for the blacksmiths in the neighborhood. 
It is my intention to employ the first leisure I can com- 
mand in collecting more precise and extended information 
respecting the formation. : 
15. Sidero-graphite. 
Extract of a letter from Dr. Torrey, of New-York. 
I have just discovered a new mineral, or one which I can- 
not find described. It is a compound ‘of metallic iron and 
pnlege: It somewhat resembles laminated plumbago. 
ts specific gravity is 5-114; is attracted by the magnet; 
burns when heated intensely, and scintillates ! dissolves im 
great measure in diluted sulphuric acid, giving out much hy- 
drogen gas. I pare analysed a small piece, and found, aren 
54-25, plumbago 11°50. I know of no such mineral, and I 
have called it “Bilecoievdubete it is found at Schooley’ s 
mountain, N. J. but the exact locality is kept a secret by the 
person who found it, as the mineral is supposed to be some- 
‘thing valuable! I shall soon, however, be able to procure 
two or three small specimens, and I will send you one. 
16. Fetid fluor Spar. . 
Mr. Augustus E. Jessup, recently attached to the expe- 
dition up the Missouri, has visited the locality of fluor spar 
near Shawnee* town, Illinois, (Vid. vol. I. p. 52,) and finds 
this mineral very abundant and beautiful. He has observ- 
ed, as he informed us, that this mineral is fetid by friction 
or percussion, and that even the fracture through a natu 
cleavage will diffuse the fetid odour around to the distance 
of two feet or more. We have repeated and confirmed Mr. 
Jessup’s observation. 
* Not far from the confluence of the Ohio and Missisippi. 
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