238 Localities of Minerals. 
with a resinous lustre,—translucent,—becomes yellowisli 
before the blowpipe. The crystals appear to connect 
prismatic masses of limestone, or of limestone mixed with 
some alumine. The whole dissolves perfectly, with effer- 
vescence, in nitric acid. 
fron Sand.--From the shore of Lake Erie, near the 
viver Ashtabula.—It is found in considerable qnantity. : 
Pisolite—From Chicopee river, Springfield, Mass.—— 
These are globular concretions, from a very minute size to 
3-8ths or 1-2 inch in diameter, often connected together in 
large quantities._-Ash-white on the outside; inside, dark 
grey ; pretty hard, opaque, concretive layers often scarcely 
discernible.——-I have never found any nucleus of any ex- 
traneous mineral —-Effervesces considerably in nitric. acid. 
Composed of very minute particles of carbonate of lime, 
silex, and alumine; the last appears to predominate.— 
Hence when breathed upon, they have an argillaceous 
smell.—I believe they are called clay-stones commonly, but 
1 know not what mineral to refer them to, except prsolite.— 
They have somewhat the appearance of small concreted 
stalagmites ; but their location and composition do not 
well agree with this mineral. ‘This notice may lead to ex~ 
amination of them. 
Localities by Mr. Amos Earon—from the minutes of the 
Troy Lyceum. 
White Mugite—Sappar—Plumbago—Adularia.—In the 
granular limestone of Canaan, Washington, and Brookfield, 
in Connecticut, tremolite abounds, and in Brookfield, the 
white variety of augite is abundant. 
Near the sorih ae corner of Haddam, on the East side 
of the river, in the parish of Middle-Haddam, is a new lo- 
eality of sappar. It is on the farm of a Mr. Selden, from 
whom I received specimens, with fibres, from six to eight 
mches in length. Itis here found in mica-slate, as at Ches- 
terfield and Conw ay. 
Above-six miles in a southeast direction from Brimfield, 
and two miles Kast of Holland meeting-house, is an exten- 
sive bed of Plumbago. Several years ago, this mine was 
wrought, and many tons of plumbago were taken from it.—— 
‘The beds of plumbago, lie between layers of gneiss, in 
