262 Third Supplement to Dana’s Mineralogy. 
having traces of a basal cleavage. These crystals show no distinct traces. Col 
brownish-black. Lustre between submetallic and wa in og a a 
ish brown translucence on the edge. Streak pale grayish brown. “ eas C= 
another piece 5100, which is below that of fergusonite for wh Allan preee 
5838, and Turner 5800. The tyrite ae decrepitates or the blowpipe 
while the fergusonite visi very slightly so. 
The evidence from fo form and most of the physical characters is so strong that we 
can hardly doubt th ty 
URDITE, D. Forbes = T. Dahil (Nyt. Mag. f. Nat. xiii)—Occurs in Bene 
near Néterd in Norway stals clinohedral. Color yellowish-brown to brown; 
streak ~ grayish yellow. vie stre greasy. Subtranslucent. .0 agment of a 
ps tube no water. BB. infusible, but glows and color 
mes dane o id ith borax in the reducing flame, a glass which is yel- 
peri somewhat greenish while ‘hot, and colorless on cooling ; with salt of phospho- 
po a skeleton of silica. No reaction of titanium or manganese. ; n charcoal 
1856,) 5) the Urdite has the form of monazite, og is that speci es; he sta ates that 
recognized the planes of Monazite, J, ii, -1i, -1, O, 27, and 28 f ay Min., p. 402.] 
stal is about an aphet in len ngth and amie and half an: inch in thickness ; 
its weight 20°5 eae It occurs in feldspar (in granite Eee eettig gneiss), and 
also enveloped in orthite. 
Vanapintre [p. 862, and Su ri . 11].— According to Rammelsberg. (Monatsb. Preuss. 
Akad., March 1856, 153), the Vanadinite of Mt. Obir near Windise h-Kappel i in Bg 
rinthia, nis for the a Page of ong to 0 tit she terninal in ytom 142° 80’. 
wis fp. 415] Be bod of earth ae ‘(Eisenlasur), by H. Struve 
(Bull. St. t. Petersb., Class. Ph ys-math,, xiv, 171 
bg Fe Fe 
29°17 21:34 21°54 27:50 et 99°55 
19°79 8311 13°75 2610, Mg 7-37 = 100712 
Found in crystals, perfectly colorless when first obtai thi nsand, near 
Middletown, Neweiithe 06, Delaw ware.—Prof. J. ©. Booth " it seapise.~ 
erved in human bones.—Nicklés, Am. J. Sci, (2), st 46 i 
he rit har is new mineral, described by E. E. Schmid (Pogg. xcvii, 108), is 
renberg, near Ilmenau It resembles a mica, and is disseminated in grani 
replacing true mica. The granite i is partly graphic granite. In oblong scales, sel- 
dom r 1 millimeter thick, micaceous in structure; color leek green, and thin — 
wn and 
t 
lustre pear rdness somewhat ve 2; sp.gr. 291. In a glass tube yields 
water, exfoliates, and mes dark brown and metallic in lustre, BB. peat easily 
to a black glass: and es the reaction of iron. Attacked by cold muriatic acid, 
giv raoelitod ye low solution, thew the insoluble part becomes after a few days colorless. 
Si a #e Fe M, Oa a i 
33°83 13°40 842 23°01 8 ry) 2°04. 0-96 9°87=99°07 
giving the formula R* §i+ #Si-+ 3H, which is that of Biotite, excepting the 
name Voigtite is in honor of M. Voi igt, director of the mines of Saxe Weimar. - 
iA” mineral of the same composition escentially, from Pressburg, Hungary, has 
been anal by von Hauer. See Wien. Sitzb,, xi, 609, 1853, and cothove Mice 
