aaa geen 008 
Rocks and Minerals of Westfield. 215 
‘ aes West- eee 6 miles east of Westfield Academy, I 
n 
4. Cowl, in rocks called the coal formation in Hitchcock’s 
geology of Connecticut river. The veins are numerous, an 
generally contain either rae: rhombic crystals of lime, 
diagonals } inch, or satin s 
5. Sulphate of Lime (eupeenes is found between the layers of 
slate. It resembles fish scales, } inch in diameter; easily 
detached from the slate. It immediately turns white before 
the blow-pipe, does not effervesce with acids, and affords 
small — crystals by cleavage. 
6. Bituminous Marlite.is found near this place. : ‘Tt hasa Rahs 
structure, though not easily split. It has a conchoidal frac- 
ture, and a glimmering lustre. hen pulverized effervesces 
strongly with pce and by pounding yields a bit ituminous 
. P It con 
oie Coie in irregular concretions. The globules, 
a oken are often beautifully om e. 
North of this locality, 4 miles, is‘a be 
8. Bituminous Carbonate of Lime. It yields a strong bitu- 
minous odour. Sp. grav. 2.62. It was formerly burnt for 
C. 
ths seen one specimen an icthyolite, found in the 
vicinity of the bituminous marli 
Westfield, Sept. 16th, 1825. 
APPENDIX TO THE ABOVE PAPER. 
REMARK BY THE EDITOR.. 
Mr. Chilton has been so obliging, as to perform the following experi- 
ments upon the unknown mineral, mentioned in Mr. Davis’s account, 
and which has been suspected by him, to be Petalite. In the want ofa 
fuller aie which we are allowed to look for, these notices may be 
‘Twenty-five grains were fused with half their weight of 
potash ; after solution in muriatic acid, ev aporation, &e. ., the 
dry mass was covered with a cohol, Sp. gr. 8.25, repeatedly 
shaken in a vial, and suffered a stand till the nextday, The 
