214 Rocks and Minerals of Westfield. 
This vein abounds in crystals of ra 
1. Schorl, 1 inch in length, and varying from 4 to 1 inch in 
diameter, terminated by 3. faces, having the terminal edges 
truncated. 
2. Actynolite, of several varieties,is found connected with this 
bed. It is found in carbonate of lime, and massive, or asso- 
ciated with green talc, The most beautiful variety is the 
- 3. Fibrous Actynolite.—It is composed of small fibres, which 
easily separate by pressure. between the fingers, and resem- 
bles asbestus. anes S 
uoted by the Rev. E. Hitchcock, in Vol. VI. p. 227, of < 
this Journal, and also in Cleaveland’s Mineralogy, p. 435. 
It is manifestly in a mica slaté region, for this rock appears é 
eenish light. It is ofa foliated structure, the surfaces of 
the lamine having nearly the lustre of hornblende. The 
is dll anduneven. Sp. Grav. 2.6. When 
pulverized, it may be taken up by a magnet, like iron filings. 
{ have serpentine, in my cabinet, from several localities ; 
none of the specimens are affected by the magnet. It 
seems to me, that serpentine of this structure, me having - 
magnetical properties, should form a new variety, and be 
called magnetic serpentine. There is a yellowish green min- 
eral associated with this serpentine, its structure is somewhat 
foliated, diverging, and variously grouped, probably sahlite, 
and so called by some good mineralogists. 
_ On the banks of the river, between these two localities, 
are several rocks of tons weight, that to the eye of the be- 
holder, seem to be composed of a grayish white talc, contain- 
