Account of a Remarkable Fossil Tree. 235 
3. Very fine specimens of bitter spar, occur In great quan- 
-‘ fities'at do. associated with silvery talc. 
4. Red hematite found on Diamond Hill, in Cumber- 
land, R. 1. It is found in an excavation, about forty feet in 
length, from five to twelve in’ width, and twenty in depth, 
which was made some years since in order to procure it. It 
"occurs in botryoidal, mamillary, stalactical and various other 
forms. 
5. Tremolite of different shades of green, near an old iron 
‘mine on Tower Hill, Cumberland. 
6. Epidote both massive and crystallized, of very fine 
colour, im quartz, at do. 
7, Actynolite in masses associated with tremolite, at do. 
8. Native magnet found in considerable quantity, though 
in small pieces, about a mile from the before mentioned 
lace. 
9. Crystallized hornblende at do. 
10. Lenticular argillaceous oxide of iron, termed shot 
ore by the workmen, obtained in abundance from a pond in 
Sharon, Mass. also an oxide of do. about the size and shape 
ofa cracker, and of a yellowish brown colour, called cake 
ore, is found there ; both of which are used at the forges in 
that vicinity. 
I found a few very good specimens of double refracting 
spar at Smithfield, and also one specimen of sulphur attached 
to the lime rock. Should these notices be considered. of 
any importance, they are at your service. — 
~ Tam Sir, respectfully yours, : 
THOMAS H. WEBB. 
Pror. Bensamin Siuuiman. 
Arr. ae — Remarkable Fossil Tree, found about ‘iffy miles 
S. W. of Lake Michigan, by his Excellency Gov. Lewis 
~ Cass ond Mr. Henry R. Scuootcrary, am August, 
1821, on the River Des Plaines, in the N. E. angle of the 
State of Ilinois—extracted from a paper presented by Mr. 
Schoolcraft to the American Geological Society. 
«Tue tract of country separating the southern curve of 
lake Michigan from the sources of the Illinois river, is a nar- 
row plat of table land, composed of a stratum of compact 
Vor. IV.....No. 2. 11 
