v 
48 Geology and Mineralogy of a part of Massachusetts, Yc. 
with which it occurs, that it is difficult to ascertain what 
they are without seeing the action of the blowpipe. Also in 
Hinsdale with plumbago, resembling a similar mixture 
from Ticonderoga; and also at Chester, greenish, gray, 
brown, yellowish, tending to crystalline forms. 
is a beautiful white augite, finely granular or compact, 
structure foliated with considerable lustre. The green 
also occurs in large aggregated grains, resembling the 
green coccolite of the Highlands,N. ¥. The minerals from 
both these localities want the peculiar lustre of the green 
coccolite, from Essex Co. N. Y., but seems to be the same 
variety. Augite occurs in mica-slate, and has actynolite, 
scapolite, &c., often associated with it. Augite is an abun- 
dant mineral among our primitive rocks. 
. 24, HORNBLENDE. 
dig” Subsp. 2. Common Hornblende. 
Very abundant in the eastern part of this section—ot 
various colors—sometimes in distinct crystals, and often in 
crystalline masses. The lamellar, fibrous, and slaty varie- 
ties, are common, especially the first and last. Also, the 
aggregate described by Cleaveland, “‘ composed of chan- 
nelled, cylindrical or very minute prisms, either parallel or 
diverging, and sometimes intersecting each other.” These 
channelled prisms are often long and beautifully diverging, 
and form the fasciculite of Mr. Hitchcock. 
Subsp. 2. Actynolite. 
The common varieties, as massive, acicular, fibrous, and 
sometimes nearly glassy, and in crystals more or less regu- 
lar, light to dark green, occur in Middlefield, Chester, &c- 
and are found associated with tale in a line which extends 
far into Vermont. It is an abundant and beautiful mineral. 
It is sometimes so diffused in minute crystals through au- 
gite and other minerals, that it is not easy to determine 
what the specimen is, unless we are able to trace its con- 
nexion with other more characteristi¢ specimens. 
Sap ner eres 
