Miscellaneous Localities of Minerals. 251 



Art. VI. — Miscellaneous Localities of Minerals. 

 1. Yenite and Green Feldspar. 



Amherst, (Mass.) Dec. 10th, 182.3. 

 To Prof. Silliman, Sir, 



About eighteen months ago, I visited Cumberland, (R. I.) 

 for the purpose of obtaining the interesting minerals, which 

 are found in that place. Among the specimens which I 

 then obtained, there was one which escaped my notice, un- 

 til very lately. Upon examination, I do not hesitate to call 

 it the Yenite of Haiiy. Its character is as follows. It oc- 

 curs massive, and crystallized. Its crystals are scattered 

 over the surface, crossing each other in all directions. 

 They are generally from three quarters of an inch to one 

 inch in length, and about one eighth of an inch in diameter. 

 Their form is that of four sided prisms, with angles of 112'' 

 and 68°; terminated by four sided pyramids. They are 

 opaque ; and of a greenish black colour, — having a lustre 

 somewhat glistening, and approaching to metallic. They 

 are of sufficient hardness to scratch glass, but may never- 

 theless be scratched by Adularia. When exposed to the 

 heat of the blow pipe, they readily melt into a dull opaque, 

 black globule. The matrix of this mineral is a compound 

 rock ; consisting chiefly of quartz, epidote. and magnetic 

 Oxide of Iron. The part of the town, in which I found the 

 specimen, is generally known by the name of Tower hill ; 

 where a number of fine specimes might be obtained. The 

 precise spot 1 am unable to designate. 



I am likewise happy in being able to increase the already 

 numerous catologueof Chesterfield minerals. While on a 

 visit to the locality of Sappare in that place, in the month of 

 May last, I found near the spot where the Sappare is ob- 

 tained, fine specimens of Green Feldspar. It occurs in a 

 rock of granite, in crystalline masses ; is translucent at the 

 edges, having a deep apple green colour Associated with 

 this Feldspar, I found the Siliceous Oxide of Manganese. 

 It has a deep rose-red colour, and is slightly translucent at 

 the edges. It is in masses composed of fine granular con- 

 cretions, with a somewhat glistening lustre. It contains 



