224 Geology, &c. of the Connecticut. 
place, [have found prehnite crystallized in groups on chal- 
eedony; but could not determine the form of the crystal. 
Also near Bellows Falls in primitive rocks. 1. saw speci- 
mens in the cabinet of Dr. Wells; but was not informed of 
the precise locality: yet the mica attached to the speci- 
mens indicated their detachment from the older classes of 
rocks. 
hia is pearly, and they are usually a little curved; color 
white. On hot coals it whitens and before the blow-pipe 
intumesces and melts into a white spongy enamel. It is but 
rarely met with. Bee eee 
44. Zeolite. Near New-Haven it is found in secondary 
greenstone, crystallized, or radiated, or mealy. (Sildiman.) 
Also at Deerfield, in radiated fibrous masses, sometimes as 
large as amusket bullet, or morerarely an inch in diameter- 
45. Laumonite. In secondary greenstone, also in loos¢ 
rolled masses of pudding-stone near New-Haven. (Silliman-) 
46. Analcime. At East-Haven, with chalcedony and 
agates. (7. D. Porter.) Also at Meriden, Connecticut. 
(Silliman.) Also at Deerfield, usually in laminated or ra~ 
diated masses, which are reniform, cylindrical and nearly 
spherical. Very rarely in trapezoidal crystals—color white, 
grey and flesh-colored. Associated with calcareous spar, 
quartz, te pec &c. and frequently effervesces a little 
ids. b, 
* 
with the ac 
47. Chabasie. At Deerfield, in cavities and seams in $¢- 
condary greenstone ; usually crystallized in transparent, OF 
brownish, or yellowish crystals ; presenting the primitive 
form, from one twentieth to one fourth of an inch in diame- 
ter, insulated and grouped on limpid, pseudomorphous and 
