Second Supplement to Dana's Mineralogy. 199 
The Columbite of Bodenmais affords : 
Go Go n F Mn ‘Ou 
45°40 35°67 0:45 1430 3°85 0-13 = 99°80 
Formula ap egg R €o?+ 3B Go. . 
Samars tas the formula 3R? il + 42 Ui, consisting of— 
tN oe Me. Mn Pe US Oe ign. 
33°25 23:11 050 190 9g 87 1663 13-29 285 0°33 =100-03 
4ischynite has the formula 2R f1+ &e Tis, pe 
1 Ti €e Ge Fe ign. 
3320 25:90 22-20 512 622 1 28 545 1:20 = 10057 
Yttroilmenite pee fl : i / 4 be Ti 5-90, ¥ 1830, Fe 1361, Mn 0°31, 
Ca 05 50, U 1:87 d La 22 
Pyrochlore (io pret 0 f Mizek) contains Y1] 46-25, ¥1 14°58, Ti 4-90 
28, ¥ 0-94, Fe 2-23, Ga 9-80, Mg 1:46, K 0°54, Na 2°69, Fl 2:21 = 100°83, 
cc. w i thy Re (f1, Ti) +221 p.c. FL [The existence of Ilmenium 
is Age In dis ae e.] 
p Coregr Bi he California, Am. J. Sci. [2], xx, 81.—Chili, J. L. 
Smite Gillis’ eo 
Coruxpum [p. 1 1, according to measurement by Kokscharov, equals 
122° 95” 5’ (Min. Rosai. ‘é na ® 
cleavage, color, lustre, har phi sae c gravity, and differs aly in e 
ft of sana and in chemical compa sition— Akad. Wiss., Wien, April, 1855. 
eh repr ip. 212].—The analyses of Danburite, by Smith and Brush ar a 
Segall ay ijteetioted: ‘without zoo reason by Kenngott in his Min. F 
for 1853, p 
D leis a 34].—The crystallization of Datholite has been carefully studied 
by F. H Schroder, in order to ase rtain whether the prism is right as ted b by ; : 
‘Brooke and Miller and Hess, or oblique. He makes it slightly oblique, though st te 
leaving it in doubt, the inelpation obtained being 90° 6’; he gives O: 27 [see Min., | 
P. 384] = 135° 11’, 0:1 = 158° 34’.--Pogg. Amn., xciv, 235. 
sore mip. 4 [p. 441}.—Coral rock of Matea afforded T. S. Hunt, Oa 6 60°50, Mg 6 
TM, Si, a 030 = 9957—Am, J. Sci., [2], xix, 429. 
“Analyses of compact magnesian limes tone of Missouri, by Dr. Litton (Rep. Geol. 
Missouri, 185 55): 
Ca G Mg 6 Al, Be Insol. or Si ak 
1, Chouteau Springs, 48:23 34-98 2-01 +520 Om =5 9085 - 
2. Atkisson’s Well, 47-01 38°86 052 
8. Cotton Rock, 50:80 40°56 1-07 
4. From Goal Measures 61:18 25°70 0 Dae gd 
The sam analyses also. of Missouri tae se! stb ies 
ae —J. C. Heus aie log 8 
i von Wal sliershavsen [see 
xix, pad eg 3 should retain the na 0 Da ite, ge 
‘or 80: 
being so called in Krantz’s eno 
3 Guttanen 3 on 99°64 
38:05 26°39 
3 Sustenborn gnh-bn, 88-43 (2618 877 2413 
t bole, gni-in, 38°39 9848 756 22°64 
; ann Bicherite 38-08 2774 826 2358 
ars 7-66 2735 8°89 2591 
ag ent ine 3828 2752 866 2 
37°35 29:02 1667 22°54 
Seas a ea NES 
235 99°93 
