242. Localities of Minerals, 



have received specimens illustrative of the geology of that re- 

 gion. Among them is limestone from Stockbridge, crjystallized 

 in large plates and rhomboids, almost white, and still fetid on 

 being rubbed, which is very different from most fetid lime- 

 stones, which are dark coloured, and even black, and do not 

 belong to primitive formation. 



Molyhdena. — In Pettipaug, Saybrook, Connecticut, molyb- 

 dena occurs. It is mentioned in the Review of Cleaveland's 

 Mineralogy, and is here cited again for the purpose of point- 

 ing out its locality more exactly. It is found about half a mile 

 to the E. of the Turnpike leading from Saybrook to Middle- 

 town, on the first road on the right hand above the turnpike 

 gate, near the house of the widow Pratt. It is not far from 

 Pettipaug meeting-house, in a northern direction. 



Beryl.— r\n Haddam, Connecticut, are found many beryls, 

 and some of uncommon size ; an accoant of one of the most 

 remarkable localities is contained in the following memoran- 

 dum from the Rev. Mr. Mather, to whom we are indebted for 

 specimens. 



" The place in which the beryls are found is in the town of 

 Chatham, about one mile and a half north from Middle-Haddam 

 landing ; about half of a mile S. W, of a large hill, on which 

 is the cobalt mine. The rock in which the beryls are con- 

 tained is granite ; the parts of which are very large, espe- 

 cially the felspar and the mica. Large masses of shorl are 

 also found in these rocks. Beryls have also been found in 

 other parts of Middle-Haddam, amongst rocks of the same de- 

 scription . The greatest diameter of the largest beryl is four 

 inches ; the least three inches. The beryls are numerous, 

 and of different sizes ; though iew are less than an inch, or 

 two inches in diameter. The length of the longest beryl is 

 five inches." 



Clay. — Near Delhi, New-York, a few rods from the Dela- 

 ware river, are found beds of clay, of which specimens have 

 been transmitted by Mr. John P. Foote, of New-York. We 

 are of opinion that they are not porcelain clay^ 



