52 Dr. Meade’s Localities of Minerals. 
made and the surface polished many varieties of crystaliza- 
tion may be exposed to view. 
Within about eight miles of Stirling on the Boston road 
in the town of Bolton a very remarkable limestone quarry 
has been worked for some years, chiefly for the purpose of 
making lime for which it is well qualified; it is little noti- 
ced as it lies off the road and is very limited in its extent 
shewing itself only on the surface of a ledge occupying a 
few acres of land; it is a large grained white marble similar 
to that of Kingsbridge and New Milford, imbedded in 
gneiss and appears to be connected with that extensive 
deposit of granular limestone which accompanies the prim- 
itive formation from the Hudson through the Western 
parts of the New-England States to Canada. Wherever 
this deposit of primitive limestone has been examined it 
assumes nearly the same character and is accompanied by 
the same class of minerals more or less interesting from 
their variety. 
At Bolton the first mineral which attracted my attention 
was augite, pyroxene of Haiiy, it occurs sometimes in sin- 
gle crystals half an inch long imbedded in the granular 
limestone which so loosely invests them that the crystals 
fall out when the stone is broken: frequently howeverthese 
crystals are observed in considerable groups firmly set 
on one end in particular, the other end of which is always 
terminated and can be easily examined. These crystals 
which are from a very minute size to that of half an inch 
long, are in the form of four sided prisms truncated on 
their lateral edges, and terminated by four sided summits 
whose faces correspond with the alternate lateral edges. 
Colourdark green on the surface though sometimes near- 
ly white in the centre; when the crystals are small they are 
of a lighter green and translucid: it is fused with difficulty 
by the blowpipe into a brown scoria. Some of the crys- 
tals have*a very interesting appearance, they are dark 
brown of an oily lustre, and have a bronze surface some- 
what chatoyant so as to resemble extremely the description 
given of the elaolite or fettstein, which as far as I know has 
not as yet been observed crystalized : however as Haiiy 
considers both scapolite and elaolite as only varieties of 
pyroxene, J see no reason why this mineral should not be 
so distmguished, though I will not take it upon me to as- 
sert it without farther observation.—Associated with these 
