142 American Geological Society. 
ford, town of Huntington, map ror 8 by Mr. Ephraim 
Late; four miles south of his mine shiek affords beormith 
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. 
e vein is much penetrated by quartz, mica, feldspar, 
ad ted 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, is the purest emerald green ; 
ieces of an inch in diameter become in 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- 
= nctly luminous and the light dies away very gradually as 
the mineral cools. This interesting property was exhibited 
to the members of the soc society. Is not this variety of fluor 
spar oe the true chlorophane of Siberia 2 
P - presented to the Society specimens of the green 
serpentine marble found near New-Have en, and which, ac- 
and various geological specimens ; among w which were varl- 
eties nei the mere rocks of Hasselt Connecticut. These 
teresting. 
* See Vol. I, page 316 of this Journal. 
