Geology, &c. of the Connecticut. 219 
and in conmels meee Xe. in esiied Spucwnee red, black 
and yel 
- Corundum. At Litchfield, massive and in paaaapier 
— imbedded in massive sappar. és) { 
. Cy anite. At Litchfield, Harwinton, Watertown ad 
near nap aes en. (Silliman. ) At the former place a mass 
of this mineral, associated with talc, sulphuret of iron and 
corundum, is supposed.to weigh one thousand five hundred 
pounds. (Brace.) Also at Middle-Haddam. (aton.) Al- 
so at Chesterfield, Mass. in loose masses in mica slate; 
where its bladed or imperfect prisms are two feet long. | 
(Huni.) Also at Granville. (Dewcy.) Also at Plainfield. 
(J. Porter.) Also at Grafton, Vermont, and Charlestown, 
New-Hampshire. (Hall.) Also at Bellows Falls. eat 
man.) Also at esnips in mica slate. ( Williams.) 
27. Staurotide. At Boliong, Eaot-Havtlord; Béacopttilt; 
Litchfield, Harwinton and Chatham. (Silliman, Brace, ‘Ba. 
Also at Bellows Falls. (Hail.) The range of mica slate in 
which this mineral is found in Bolton, Chatham, &c. extends, 
with little interruption, into New-Hampshire and Vermont, 
at least as far as Bellows Falls;-and its aspect is very simi- 
lar throughout, and scarcely a mile of the distance is it want- 
ing in staurotide; or rather, wherever | have crossed it, (in 
perhaps fifty places.) this mineral occurs; as in Vernon 
where it is in vast quantities, in North-Wilbraham, Ludlow, 
Shutesbury, Leverett, Northford, Hinsdale, Chesterfield, 
‘utney, Westminster, &c. In Chesterfield; Ne ew-Hamp- 
shire, Dr. J. A. Allen found cry . fa inch and one fourth 
in diameter, and two inches an half long, in the valley 
south-west of the meeting-house. ag range of similat mica 
slate extends through Chesterfield, Mass. into Cummington, 
Plainfield, Hawley, &c. and here also staurotide occurs in 
abundance. In Chesterfield I noticed a mica slate rock, 
two or three feet thick, containing seven or eight distinct 
layers of this mineral. 
28. Pinite. At Haddam, in mica slate and granite. (Sil- 
liman and Webster.) Also at Bellows Falls. (alt) 
