236 Localities of Minerals. 
Arr. 1V.—iLocauiries or Mineraus, 
Localities—communicated by Professor Dewxny-of Will- 
tams* College. 
Tue new locality of serpentine, was found in Middlefield, 
Hampshire County, by one of our graduates, E. Emmons 
of that town. It is connected with the beds of soapstone; 
indeed, the soapstone often passes into serpentine. It oc- 
curs, green of various shades, reddish brown, gray, yellow- 
ssh-white, and cream-coloured, with spots of a smoky hue, 
like smoky quartz in this respect, but certainly serpentine. 
Tt is sometimes associated with quartz, filling the cavities of 
strata of quartz, covered with minute crystals. Its hard- 
ness is very variable—some of it is disintegrating, some is 
‘fibrous, and seems to be passing into salaece. “Much of 
this serpentine, especially the lighter coloured, is remarka- 
bly fine. The whitish decrepitates much, when high tem- 
perature is suddenly thrown upon it. Odour i is strongly mag- 
nesian, when the mineral is breathed on. In some speci- 
mens are yellowish and reddish brown portions of a crystaline 
structure, and in some, cavities are filled with these imper- 
fect crystals. They break into a rhomboidal form, and are 
sometimes very regular rhomboids. Some of them, are so 
closely serpentine, that they may be all the same mineral. 
They contain, like the rest of the serpentine, magnesia, ox- 
yd of iron, often so minute, that they are discoverable only 
under a magnifier, or by the magnet. 
Mr. Emmons has also found, beautiful masses of actyno- 
lite, often containing small tufts of the fibrous variety. White 
talc is often mixed with the actynolite. 
Bitter Spar, is found there also, in the soapstone, associ- 
ated with beautiful green talc. ‘The spar is laminated, white, 
and yellowish—but some specimens, when fractured, pre- 
sented numerous small rhombs. 
I have found in Sheffield, (Mass.) masses of Tremolite, 
with fibres two feet long. I never heard of such tremolite. 
* In Prof. Dewey’s piece, (Vol. I. pa. 337,) Williams College is errone: 
ously printed Williams’ College. _ 
