Third Supplement to Dana’s Mineralogy. 257 
ee [p. 170, and Suppl. 1, m].—Crystallo graphic and optical relations to 
pyrox » W. Haidinger, Sitzungsb. Akad., Wien, xvii, 456.—An_ important paper. 
Bilis cir [p. 456, and apt ]. apa by Prof. OC. U. Shepard as observed 
oe re n Mine Gell orgia (Re 56), “at one spot ike ie os heat taeak where 
und in very beautiful tak aed crystals, lining small cavities of botryo oidal 
white soe -pyrit 
Leap [p. 17].—Native lead and lead ochre are r reported as occurring at Zomela- 
buacan in the state ~ era = re z, ina mete by M. Néggerath (Zeits. d. 
i The amygdaloid from near Weissig, accor ing to G. Jen times contains 
in its cavities native os Winget be pyrites Weissigite, shitaenia Gaurd galena, 
abr Min. 1855 
Native lead is sath to occur als the Altai (v. Hingenau’s Oest. Zeits. 1854, in 
N. Jahrb. f. Min. ete. 1855, 837) seven miles from Mt. Alatau in v2) _ region. It 
8 ae as accompany ing limonite, magnetite, and galena, in irregular 
a dra n weight. Grains of native lead are also found with “the: gold near Ekath- 
erinenburg i in the Urals, 
Levorre [p. 231].—The leucite of the modern lavas of Vesuvius, accordi to De- 
Ma (L’Institut, No. 117 73), contains much more soda than that of ‘the old lavas of 
omma. The i 
la 
(Fossa Grande). The same for me lavas of 1847, accordin Damou' 
Rammelsberg (Monatsb. — a vest 1856, 148) 34 publis ‘hed a 
Paper on leucite ere its pseudomor eters 
Portion of soda in thn slbagadl delatthet® anda a8 cl plans 
Levoopyaire (p. 61, 507]—Composition by G. A. Behncke eal xcviii, 187): 
ae 
Geyer G=6246—6321, 607 5894 1°37 Ps 9999: 30 
2 Breitenbrunn, G.=7 282—T- 259, 110 6985 105 27:41==99-41] 
Regarding the sulpbur penne combined with part of the iron and arsenic as mis- 
Piekel, the analyses, this excluded, become—the ae aie nic 67:06, iron 32°94=Fe* 
As"; the 2nd, arsenic 72: 19, iron 27'71=Ke As? 
_Xetaavire 41, and Suppl. 11—D. Forbes and . Dahil. (Nyt. Mag. £ 
%i,) mention a m2 ; ce of mse Ee Keilhauite weighing 15 ag corning * 
Alve in N orway. , or =a. “Two parler cleavages cross at 138°. Color 
dull brown, _— e le diny 9 _ ow. B.B infusible and unchanged. Specimen 
near Naresté had G.=3 519; and a pale grayish brown, from Alve, G =3'603. 
In the Edinb. x. . Ph. Ji, [2], ii Jan. 1856, Dr. a — — gh _ percentage 
he oe acid should read 28-04, instead of 28 mpariso the angles of 
als with those of sphene, made by Professor Miller of Gumbridge, is here 
= [p. 1701—Analyses by Rev. J. A. Galbraith (J. Geol. Soc. Dublin, vi, 
165); 
Bi «#l «Fe Ca Me K Na @ 
a Dalke 23 034 103 671 060 8u3=—98-42 
2 Killin Petes kaa 5045 30.13 353 — 109 481 095 753=98 54 
The first H. a Lies 3:10; and the 
ee ne n ration for R, #, Si and H. 1: 
aoe 176.296; which Mr’ Galhraith takes at 1:6:1278, and writes 
ks formula i Suaiesie ait The results agree very ts we = of Lehunt 
Blyth, an m the analysis of Mallet sag Min. a 170]. Specific gravity 
SECOND ae VOL. XXII, NO. 65.—SEPT., 
33 
