Miscellaneous Localities of Minerals. 47 



16 Impressions on Shale, at Valley Falls about two and 

 a half miles north of Pawtucket. 



17. Tremolite, at North Providence. 



5. Br CuARLES W, Shepard, 



Cambridge, Oct. 8th, 1824. 



Sir-^ 



I have discovered a new locality of the green mineral, of 

 which a notice was published in the last number of your 

 journal. It is in Amherst. This mass is much larger than the 

 one first found, and differs from it in being more uniformly 

 coloured, not having whitish or yellowish spots distributed 

 through it, and, likewise, in being of a deeper color. I have 

 noticed, likewise, that, in a single place, it passes into com- 

 mon quartz. From the appearance of this mass, I think 

 there is no doubt of its being the hornstein eccailleux of 

 Brochant, which he describes as sometimes bordering on 

 chalcedony. 



In Belchertown, I have found very handsome Amethyst^ 

 contained in a rounded mass, about IB inches in diameter, 

 composed of imperfect, prismatic crystals of an extraor- 

 dinary size, which shoot out from a quartzy gangue, con- 

 taining galena, blende and copper pyrites. Many of these 

 crystals terminate in regular pyramids at the surface. But 

 just previous to their termination, the amethyst passes 

 through them in a vein from one to two inches in width; 

 and below the vein, are zigzag striae of milky quartz, which 

 render many of the crystals very beautiful. 



In the town of Oakham, fine specimens o{ Adaluria may 

 be obtained in great abundance. It is sometimes found in 

 six-sided prisms, which are several inches in diameter. 



1. Scapoliie, at Littleton, (Mass.) in a lime-quarry, own- 

 ed by Mr. Wheeler. It is very abundant, and occasionally, 

 finely crystallized. 



2. Vitreous Black Ox. Iron, at the South Hampton Lead 

 Mine. It is usually found investing carb. lead. It pos- 

 sesses a high vitreous lustre. It does not melt before the 

 blow pipe : but immediately becomes strongly magnetic. 



