ee a ee 9. Lime-Tiphdelec 3 Fite 2 wpcnyek CH pion. 
The minerals presented to me by Alex, ‘Trippel, Esq., con- 
_ tained an interesting variety of spiders from the. Poll Oodaty 
_ Mine, East Tennessee. It occurs in large but indistinct crystals, 
which are lengthened parallel to «i, which plane is best devel- 
Oped and can be distinctly observed on eve 'ystal ; some o 
_ Me crystals show also the planes 17 and 4, but the two latter 
secret are obliterated, and generally can be recognized only 
_ by adeep striation. The cleavage is very distinct parallel with 
_ & The color is grey, with a blueish greenish or greenish brown 
chat, Their sp. gr. at 12°C. = 8°344. Frequently, especially 
the larger crystals, intermixed with chalcopyrite and pyrites, 
and quartz. “I found them to contain; 
Ignition, eee 0-71 
Silicic acid, 39°78 40°04 
ina, cet 30°63 
sine oxyd, etex ace 
anous oxyd iis a 
' Tine, ae ee 2511 
: Magnesia, eee trace 
Cupric oxyd, sue O24 
99°20 
Another variety in aggregations of coarse grained, confusedly 
crystalline, minetinied wou masses of a greyish white color, 
has evidently undergone a partial decomposition ; it is associ- 
ated with blende, harrisite, garnet, ete. Mr. Trippel has com- 
maunicated two analyses, I. by fluohydric acid, IL. by fusion with 
ined : . 
4 
ir 
ee 
nate of soda. He obtain 
lis tas Ee Or ‘eee 
area PEL Galle Sie 29°08 — a 
eric 0: ‘ prints aoe 2-18 
Magnesia. - i ‘ si ee 0°60 0°56 
Me eg ee ee 22°72 
apattion, ES ip 29 Vas 0-26 026 
Potash, a Oa ewigi sy Gel 
99-22 
This 10. Leopardite, a true porphyry. 
his peculiar feldspathic rook, which occurs in the neighbor- 
hood of Charlotte, Mecklenburgh county, N. C., and first noticed 
fy tof. C.U. Shepard as the leopard stone of Charlotte, and 
Py C.L. Hunter, (this Journal, [2], xv, 377,) has also been ob- 
ar 
ae and Manga ese, ha e made an examination of it, Ww 
proves it to consist of a feldspathic matrix and disseminated 
igh it minute crystals of a feldspar, apparently orthoclase, 
Showing rectangular cross-sections, and six-sided double pyra- 
