238 Localities of Minerals. 
vescence, in nitric acid. 
on 
dr 
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 Eatroxn—from the minutes of the 
ate Troy Lyceum. « 
White Augite—Sappar—Plumbago—Adularia.—Iin the 
granular limestone of Canaan, Washington, and Brookfield, 
in Connecticut, tremolite abounds, and in Brookfield, the 
white variety of augite is abundant. 
_ Near the northeast corner of Haddam, on the East side 
of the river, in the parish of Middle-Haddam, is a new lo- 
cality of -sappar. It is on the farm of a Mr. Selden, from 
whom I received specimens, with fibres, from six to eight 
inches in Tength. It is here found in mica-slate, as at Ches- 
terfieldand Conway, 
Above six miles in a southeast direction from Brimfield, 
and two miles East 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 1t-— 
The beds of plumbago, lie between layers of gneiss, 
