Middleiown Minerals. 207 
hess Williams, is the e where eae Gobnecsicus river, 
éme of the rubelililes are half an inch id ialeroaiee the 
erystals are distinct, and the colour lively and delicate. A 
sroup forwarded me by another gentleman for inspection, and 
to be returned, is singularly rich. It is situated in a mass of 
granite, and covers a space of about four inches on each side. 
This space is filled with crystals of rubellite, laterally aggre: 
gated like columns of basalt, or like the column: argillaceo 
von Ore ; there appear to be forty or fifty of them, and the <3 
are as distinct as erystals so closely compressed usually are. 
In the midst of them there lies a large crystal of the size of a 
thumb, of a dark leek green which much resembles sallite, 
but as there is in another part of the stone a large crystal of 
rubellite, containing a distinct crystal of the green substance, 
perfectly threaded, longitudinally through it, in the manner 
of the Chesterfield tourmaline, although in the reverse or- 
cats it appears probable that the green crystals are tourma- 
ine 
a3 
We trust that every attention will be given to this new and 
interesting tocalit ity. 
P2s, oetolee 15,1825. The honest information has just been 
recabecll from Mr. Williams, in a letter dated 
: MippierTo™ %, Oct. 12th, 1825. 
Iam happy to ay ae you that I have discovered rubel- 
lite, beryl, &e. in place. The rock in which they are 
siteated i is two anda half miles south-east ate the eity, and 
forms part of the primitive region, which crosses the Con- 
necticut river atthe narrows. The ru ellite i is oiiia 4 ina bed 
of granite, where it is associated ties green tourmaline in a 
vein of quartzand feldspar traversing the granite. The green 
tourmaline is frequently inclosed in the red, the sides and an- 
ee of both nag corresponding : a crystal of this kind, which 
but was unable to detach from the rock, measured 
/ Bice quarters of an inch in diameter. The same granite 
