Intelligence and Miscellanies. 199 
the most powerful heat of this instrument, melted down into 
a pearly. white translucent glass, or enamel. ith micro- 
cosmic salt it appeared to dissolve, with the greatest reluc- 
tance, into a transparent colorless glass, leaving behind small 
skeleton-like masses of silex. With borax, it dissolved with 
difficulty and without effervescence, into a transparent, and 
colorless glass 
The present mineral appears to correspond with that _— 
ded to b Rose 2 in the memoir before mentioned, and w 
he found to compose nearly half of the Juvénas nhetotieitia 
He ascertained that - contained 0°60. p. c. of soda: a quan- 
tity so small, that he suggests unless it be a new mineral, 
it belongs to his species, labradorite—a substance better 
known generally under the name of labrador feldspar. Its 
general aspect, however, as it appears in the Virginia stone, 
would render it more. proba se that it belonged to the varie- 
ty albite, than to the labradori 
orms a large proporebl in the Maryland and Stan- 
nern aerolite, and exists in the stones of ’Aigle and Weston, 
sah in the last, in but very issal proportion. 
3, hf MONS af Jame. 
ahi in a few points. When a fragment of the stone is bro- 
ken down, however, we rarely fail to — a few grains 
which are at once recognized by their color 
Mineralogical description. 
External shape, globular — reniform. Structure lamel- 
lar. Brittle: fracture conchoi 
Lustre vitreous. Color honey cellanes transparent. Hard- 
ness such as to scratch crystalized arragonite e from lies but 
not asparagus stone: is scratched itself by the knif 
Chemical characters. 
Before the blowpipe upon charcoal it phosphoresces with 
great distinctness, and becomes rounded the edg with- 
out andergoing any perceptible ebullition, et without loss 
of trans ith microcosmic salt, it forms a trans- 
ency 
parent he at first with a tinge of yellow, but becoming 
