142 American Geological Society. 
ford, town of Huntington, Connecticut, by Mr. Ephraim 
Lane, four miles south of his mine which affords bismuth, 
tungsten,* &c. According to Mr. Lane, this vein is two 
feet in width; and its immediate walls are white granular. 
limestone which forms an extensive bed in gneiss. This 
fluor spar appears at two places, distant a fourth of a mile, 
and, when the snow is gone, will probably be found to form 
a gigantic vein. It has been observed only since the snows 
fell, and was first noticed in some fragments of lime stone, 
which had been quarried for burning. 
The vein is much penetrated by quartz, mica, feldspar, 
and tale, but, it has been hitherto examined only on the sur- 
face. It is principally massive and its structure foliated or 
coarsely granular, but it presents well defined cubical crys- 
tals. Its colours vary from white to deep violet and purple, 
‘and are, principally various shades of the two latter. But 
the most interesting circumstance relating to it is its splen- 
did phosphorescence. The light emitted when, it is thrown, 
in a dark place, upon a hot shovel, 1s the purest emerald green ; 
pieces of an inch in diameter become im a few seconds, ful- 
ly illuminated, and the light is so strong and enduring, that 
when carried into a room lighted by candles, or, by the 
diffuse (not direct) light of the sun they still continue dis- 
tinctly luminous and the light dies away very gradually as 
the mineral cools. This interesting property was exhibited 
to the members of the society. Is not this variety of fluor 
spar then the true chlorophane of Siberia 2 
Prof. S. presented to the Society specimens of the green 
serpentine marble found near New-Haven, and which, ac- 
cording to the opinion of Mr. Brongniart of Paris, is the 
verd antique marble. 
Col. Gibbs presented Smith’s Geological Map of England, 
and various geological specimens; among which were vari- 
eties of the granite rocks of Haddam, Connecticut. ‘These 
rocks contain tourmaline, garnets, sometimes of very great 
size—bery!s and crysoberyl, both massive and crystalized. 
This being the only locality known in which the eryso- 
beryl oceurs in place, the specimens are therefore very in~ 
teresting. 
* See Vol. I, page 316 of this Journal. 
