222 Geology, fyc. of the Connecticut, 



38. Beryl. At Brookfield, Huntington and Haddam. {Sil- 

 liman.) Also at Litclifield- {Brace.) Also at Chatham. 

 (Mather.) Also at Chesterfield, Mass. and Goshen. (Gibbs.) 

 At Chesterfield and Haddam the crystals are sometimes 

 from nine to twelve inches in diameter. At Goshen some 

 are rose-colored. I found some crystals of beryl four or 

 five miles north of the centre of Haddam. 



39. Garnet. At Haddam — four inches diameter. (Silli- 

 man.) Also at Tolland, nearly rose-red. (Webster.) Also 

 at the cobalt mine, Chatham, in mica slate, crystallized in 

 rhombic dodecaedrons, or rather six-sided prisms termina- 

 ted by three sided pyramids — the prisms often considerably 

 elongated — color pale red- — size that of a common musket 

 bullet. Also at Plainfield, in limpid quartz, in trapezoedrons, 

 or having at least as many as twenty-four sides — color of 

 the mass nearly iron black. Found by J. Porter. Also 

 at the same place in talco-micaceous slate, in dodecae- 

 drons; color brownish red; size of a pea. Also at the 

 same place, in dodecaedrons, truncated and striated on all 

 their edges by hexaedral faces ; presenting thirty-six faces 

 in the whole — color dull red — size of a common bullet. 

 Also at the same place in talcose slate, in dodecaedrons of 

 the same color, sometimes two inches in diameter. Also at 

 Chesterfield, Mass. with sappar, in trapezoedrons ; color 

 light rose-red — size of a pea. Also in hornblende and mi- 

 ca-slate, in Conway and Deerfield ; color nearly black — 

 crystals dodecaedrons — sometimes as large as a common 

 bullet. Also in Conway, a loose mass, almost wholly made 

 up of small black garnets in dodecaedrons — size less than 

 one tenth of an inch in diameter, and with scarcely any dif- 

 ference in the size of hundreds. Also at Marlborough, Ver- 

 mont, one mile south of the meeting-house, in dodecaedrons 

 of a cherry-red, in chlorite slate; but hardly the precious 

 garnet. They occur at this spot in immense quantities, 

 and beautiful specimens may easily be obtained. A hun- 

 dred other localities of the common garnet might be men- 

 tioned; since it occurs in all our primitive rocks : but the 

 most interesting have been noticed. 



1. Pyrope. At Brimfield, Mass. in granite, the feldspar of 

 which is light green — in rounded irregular masses of a del- 



