Supplement to Dana's Mineralogy. 369 
Sruerutire and Rertyrte or Prroustone [p. 248].—Anal Delesse (Ann. d. 
Mines (51, 451): of ne cage 
Si Al 
kh rein 72°20 1565 164 050 062 098 171 552 1129949. .G.==2'459 
2. Retini 70-59 13-49 =e 030 O70 181 429 352 vidonae ane 
en the 2 given are from the same mass. The formation of spherulite within 
the retinite is regarded as an iMpure crystallization of ‘icupa 
Sropumene [p. 169].—Specific gravity of variety from ae 3182: J. L.Smith. 
2). —A oe sulphur of Radoboy in Hungary, owes its color bod 
cording o Magn s (Pog Ixli, 657) to mixture ‘ith a bituminous eax 
impregnating a tittle i: material, the whole amount of this material being 
ee 
YLVAN oe oa OA) Bennet lee compared (Sitzungsber. Akad. Wien, xi, 977) 
all the an sylva anite and shown that the ratio between the telur rium 
(eluding ns muting) ond the other’ poles varies between 2°48:1 : 
n being abou 
Shere tp. aye, ss x —Anal. yses by Dr. F, A. Genth of tetradymite from Flu- 
vanna Co., Va. Sci., [2], xix, 16. The oa correspond closely with the, 
formula Bi Te? = =r 48°06, ‘bismuth & 
Terranepkire (Gray Copper, or Fahlerz) ip 82, 512.]—Analysis of the mineral 
from stone Gold Mine, Va, and Cabarras Co., N. C., F. A. Genth, Am.J. Sei., [2], 
xix, 1 
Taververre dP te ._Owenite identical with Thuringite, Dr. F. A. Genth, Amer, 
J. Sei, [2], x 
Tuxestates.— Wolfram, Scheelite and Pen —— of Copper, [Min., p. 502], 
* North hy F. A. Genth, Am. J. [2], 
tYRITE, D. Forbes—Resembles_ euxenite. Occurs i in os having a square. 
avage none. H. =65; 
C=s0 at c0° FS 5°56 of a massive piece. Color. aus Ths e same asin eoxen 
Sag “x Ca Y Ge Fe H 
4490 5:66 a 29°72 5°35 303 6°20 4°52 == 100-25 
Oxygen, . 264 0-2 O77 O35 138 402 
Taking the atomic weight ee tantalum for that of columbium, the oxygen oe 
bases and silica 1 is 5°23 . 11°31, [which is that of Columbite]. Occurs with e 
ite ene a apitaars called Hampemyr, Norway 
ckiTE [p. 895]—Analysis of vast by T. S. Hunt,* (Amer. J. si, 
oe xi, ci, 359): 
a Ti 31-5 Be aie fre 81 ine pa nae pas 
ae mn ae oe he small In 
loss in the analysis, ticks for want of aus oe was avon “hestigate is fae tone 
sagt i rig coring 0G ho sh small ey of wari 
3 of 3'423, (Communicated. = 
On ae the proportion of ior of boracie es gemma wickite should be 
stated at 15 to 20 per . : 
* Mr. pon Cleeladsie was instituted as a species. on ¢ the large crystals of the 
Warwickite, w suggests, partial The composi- 
thachtaiia ene sd stealer all other examin- 
Pe em tee eng pe Deeg the mineral was a distinct species. 
Stooxp Senms, Vol. KIX, No. 57.~May 1855. 47 
