180 Miscellayiies. 



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 fragments can be obtained, unless expensive excavations 

 are made. 



Associated with the above mentioned minerals are also found small 

 traces of the following : , 



1. Zeolite, in small masses, whose fracture presents-stellated radiations 

 of a pink color. Their size varies from one fifth to half an inch in diam- 

 eter. 



2. Calcareous Spar, (with the last mentioned Chabasie) in hexagonal 

 prisms ; and at the other ledge, in compact masses. 



3. Scapolite, of an imperfectly crystalline 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 three quarters from the vil- 

 lage of Stonington, are several veins of quartz, partly compact and in part 

 composed 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 ledge. 



At this place were also found thin veins of calcareous spar, dolomite, 

 and serpentine. ' W. W. Rodman, A. B. ' 



Yale College, Aug. 1838. 



6. Crichtonite, in R. I. — It is found in the town of Westerly, R. I. in 

 a ledge 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, in im- 

 perfect crystals, is disseminated through a mass of semi-crystallized 

 quartz, which is two or three feet in length, and about one foot in width 

 and breadth. W. W. R. 



7.' A Flora of North America: containing abridged descriptions of all 

 the hiown indigenous and naturalized plants, growing north of Blexico ; 

 arranged according to the Natural System : By John Torre y 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, which has been 

 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 have 



