208 Geology, dc. of the Connecticut. 
14, Mine of Magnetic and Micaceous Owide of Iron, in Haw- 
ley. 
This exists in the north western part of the town, in beds, 
in talcose slate. The folia of the slate are nearly perpen- 
dicular to the horizon, and the principal bed of the ore va- 
ries from six inches to three or four feet in thickness, and 
numerous thin beds occur at the sides. ‘The mine has been 
opened twenty or thirty rods long, and thirty or forty deep. 
The magnetic oxide is probably most abundant: but the 
micaceous oxide has not till lately been wrought, through 
an impression that it could not be smelted! One or two tons 
of it lie beside the mine ready for the mineralogist. I have 
never seenany ore of this sort, that will bear any comparison 
for beauty and richness of appearance with this. It has a 
schistose, gently undulating structure, and plates of it may 
be easily obtained, a foot in diameter, possessing a highly 
glistening aspect. But it is no very easy matter to get at 
this mine, on account of the extreme roughness of the coun- 
try for several miles around it. ; 
15. Mine of Magnetic and Micaceous Oxide of fron, in Ber- 
: _ nardston. ~ 
This occurs in beds in talco-argillite, and is so similar to 
the last described, that additional remarks are unnecessary: 
I donot know to what extent it has been wrought. 
16. Vein of Micaceous Oxide of Iron, in Jamaica in Vermont. 
This exists in dolomite, and is very beautiful. It has been 
used as a substitute for smalt, and answers well. 1 do not 
knowits extent. Itis a few miles beyond the northern lim- 
its of the map. 
17. Mine of the Brown Oxide of Iron, in Salisbury in Con- 
cul. 
This, as well as the two following mines, occurs a consid- 
erable distance beyond the limits of the map. I merely men- 
tion them, however, because of their interesting nature; and 
