284 Notice of Minerals in the vicinity of Providence. 
sand or.sand. mixed with aluminous matter, and.at,a consid- 
erable distance south of..the primitive range. -How.it was 
formed or whence it came, is, to Mey not easily: eApleined. 
‘Some months since a mineral was received in Baltimore 
from the western part of Virginia, which on examination, was 
found to contain the oxide of cobalt combined or associated 
with the ore of manganese. The mineral found in Virginia 
is essentially different from the one. found near Baltimore— 
the first being the oxide of cobalt, chemically (1 believe) 
associated with the radiated. or. stellated ore or black oxide 
of manganese. That found in the. alluvial. district near 
Baltimore contains, it is true the same oxides, associa- 
ted, but the appearance of the mass and the situation when 
found.in the sand pits, would incline one to suppose that a 
solution of these two substances had been formed upon a 
lump of sand, cementing as it were the whole togethers In 
this state it has a dark bluish appearance, a harsh fouge san- 
_ dy texture, and is somewhat weighty... , 
6. Notice of Minerals in the vicinity of Providence, ( RI. ) 
‘ina letter to the Editor, dated Nov. 26, 1821 ob Famt Mr. 
Tnomas H. Wess. 
Sir— 
I have forwarded to you in the bee sent Mr. George T. 
‘Bowen, a specimen of the green tale which I wrote you 
some time since, was found at North Providence. There 
are also in the box specimens of silvery talc, from Harris’ 
lime rocks, Smithfield, much better:than the one I sent you 
before. ti is found in considerable quantities attached to 
~bitter-spar. Among the minerals which have not hitherto 
been noticed, that occur in this vicinity, and elsoprhenty; are 
_ the following, viz :-— 
“1, White fibrous tremolite,* found i in eee quan- 
’ tities, amongst granular lime stone, ‘at Harris’ lime-rocks, 
“Smithfield, R. I. It gives out a fine phosphorescent light, 
when placed on a hot shovel, and also phosphoresces by 
friction, ina dark room. 
.., 2. Earthy tremolite at the same place. 
“Mr, Bowen gaye you a specimen of this some time azo, [ believe. — 
ai ~ ete 
* 
