240 Localities of Minerals. 



thin, but considerably numerous ; the coal is very glossy and 

 black ; breaks with a smooth and almost conchoidal fracture, 

 and very much resembles jet. It is very much intersected by 

 thin veins — (not thicker than a knife-blade) — of white crystal- 

 lized calcareous spar. This coal is bituminous, and burns 

 pretty freely. It has not been explored, except superficially. 



Coal, in Southington, Connecticut. Beds of slate are found 

 more or less bituminous ; and, at the bottom of some of the 

 wells, the slate begins to exhibit thin veins of coal, distributed 

 in great numbers through the substance of the slate, which is 

 the shale of the miners. The coal is from the thickness of a 

 knife-blade to that of a finger; it is highly bituminous, and 

 burns with great freedom. Even the entire masses of the 

 stone burn brilliantly, when ignited on a common fire ; and, 

 after exhaustion of the coally matter, leave the slate of a gray- 

 ish colour. 



The locality from which the specimens were taken, is on 

 the land of Roswell Moore, Esq. about midway between Hart- 

 ford and New Haven. The spot was lately examined by Col. 

 Gibbs, Eli Whitney, Esq Professor Olmstead, and others ; and 

 arrangements are making to bore the strata, to the depth of 

 several hundred feet, if necessary. These localities are in 

 what may, with propriety, be called the coal formation of 

 Connecticut. Coal has been found in several other places in 

 that state ; and the peculiar geological features of the region 

 in which it is contained, are very interesting, and may here- 

 after be described in form. 



Sulphat of Barytes, with Coal, <^c. — Sulphat of barytes ex- 

 ists abundantly in Southington, on what is called the Clark 

 Farm. With quartz, carbonate of lime, &c. it forms thegangue 

 of a metallic vein, containing galena, or sulphuret of lead, 

 copper pyrites, &;c. The sulphat of barytes is more or less 

 crystallized, and principally in the form that is called the cox- 

 comb spar. The same vein, although it is in the side of a 

 mountain, several hundred feet above the flat country adja- 

 cent, and two or three miles from the coal strata above men- 

 tioned, conttiins numerous spots and patches of coal, very much 

 resembling that at Suffield. It is of a most brilliant black, and 



