186 | Miscellanies. 
one tenth of an inch in diameter. Owing to the brittleness of these min- 
erals and the great hardness of the rocks in which they are imbedded, 
none but small ones can be obtained, cmd expensive excavations 
are made. 
Associated ithe’ the above seaitionad mes are also found small 
traces of the following : 
1. Zeolite, in small masses, whose fracture presents stellated radiations 
ofa po color. ‘Their size varies from one fifth to half an inch in sie 
eter. 
2. Calcareous Spar, (with the last mentioned Chabasie) in hexagalald 
prisms ; and at the other ledge, in compact masses. 
3. Scapolite, of an imperfectly semaine structure, and light green 
color, partly decomposed. 
4. Sphene, in two or three minute black crystals. 
5. Apatite, in small crystals of a bluish green color. 
6. Magnetic Iron, in small masses, 
In a ledge on the ‘rail road, three miles and dived quarters from the vil- 
lage of Stonington, are several veins of quartz, partly compact and in part 
-of interlocking crystals.- In two of these, which were from 
half an inch to an inch and a half in thickness, was found a layer of 
Fluor. It is generally about one fifth of an inch in thickness, varying, 
however, from one third to one tenth of an inch. The colors are light 
green and dark purple. 
_ Traces of the same mineral were found in other veins at the same elie 
At this place were also found thin veins of calcareous spar, dolomite, 
and serpentine oo W. W. aaa A. B.. 
ag Ss 
in R. rane is found in thos town « of a R. I. in 
pity of gneiss, which has been quarried for building stone, on land — 
owned by Mr. Nathan F. Dixon. It is situated one fourth of a mile north 
of the 6th mile stone, on the Stonington rail road. The mineral, im im- 
perfect crystals, is dhiseminaied through a mass of semi-crystallized 
quartz, which is two or three feet in length, and about one foot in width 
and breadth. Ww. W.R 
Bi 
7. A Flora of North America: containing abridged descriptions of all 
the known indigenous and naturalized plants, growing north of Mexico ; 
arranged according to the Natural System: By Joun Torrey and Asa 
Gray. Vol. I, Pt.1, pp. 184 8vo. G. & C. Carvill & Co. N. York, 1838. 
Here is the first number, and the earnest of a work 
long and anxiously desired by the botanists of the United States; and 
which will, doubtless, be cordially greeted by the cultivators of botanical 
science, throughout the world. The plants of North America ae 
which has been, 
