Third Supplement to Dana’s Mineralogy 255 
avactiTE [Su 1, 1].—In the author’s 1st ee ip te: Pring acs 
: 1855), he prdatiad - that the asters of galactite a i ¢ formals 
of natrolite, whence, he concluded, that galactite is Rt rolite. ee 
specime ‘ - gianna 1 have since been examined by Dr, eda oie Mag. ‘sh 
Xi, 272), an mposition of natrolite eee in eae 
(1, 2, 3) are hi eentta together with analyses of related 
Si Al OGalSCONa 
: Glenfarg, oe 48-24 2700 082 14:82 oa = 10012 
47-84 27-112 4312 11-304 1024 = 100808 
3 Campsie Hille, 47-324 27:36 263 - ‘954 10. 392— 101-060 
4. Bisho ptown, white, 4760 2660 0-16 “36 56 = 99:78 
5. “ "pink, 47-76 2720 0-93 is 2 956 = 99 
: Baating net } 48.033 25:26] 2313 13-975 9-723 rete: om Pi tigeen 573 
7. Dumbarton Moor, 46-96 26-908 376 1283 9:50 — 
ENA [p. 39, 506, and Suppl. 1, 1].—A galena cnt 87 p. c. of sulphur, 
i is 51°30 of a of lead has been observed at Neu-Sinka, Sitenbang and 
— y mann. This mechanical mixture hie been called super-sulphu- 
lead and ie Joleittonite Jahrb. k. k. geol. Reichs. 1855, 1 
Garver [p. 190, and Suppl. 1, 1].—An analysis of the green garnet which occurs 
in brevicite on the a of Stokoe in the Brevig Fiord afford Dr. D. Forbes (Edinb. 
N. Ph. J. [2], iii, Jan. 1856): 
Ae Al #e Mn Ca Mg Nad loss 
ai 8-73 20°55 2:40 32-09 trace -- 1-27 
4 33 84 918 20°31 31:92 oe 
23:94 
30-1 id 
ts Stead to the formula, as Dr. Forbes states, ({Ca?+4#e) ato 
ee = eager 35° fle pes 32:98, eoraioxys he = (alumina) 31:41=100, 
iden in composition with lanite, notwithstanding ite — 
The cals lie together, forming 6-sided RE 7 are di stinct »mbic dodecahe- 
oe Color fine leek-green. G. (from 76 crystals at 60° F.) 3 
Melanite from in Teil tuhl afforded Schill (G. Leonh. Min, Badens, 1855, in 
Ny, aes 1855, 838): 
Si Al Oa M, Fe Mn 
45°80 11-00 22°10 2-00 18:25 770 = 99°85 
= ‘Suppl. nr, under Garnet, for Bi read Si.] 
BERTITE [p. 223].—E. Zschau states his Heyes that wither ¥ at Graupen is 
dre fom topes, : here it occurs associated with topaz, tin ore, fluor, apatite 
ries : rat the same he regards as ear true of ‘the gee of Al- 
tenberg, Ehrenfriedersdorf, ete—(Letter to G. J. B, a3 under Unpirz.) 
Gtasenrre [p. 65].— According to Scacchi {cp cit., p. 186) this sulphate of pot- 
~ which is not ome at Vesa nae rather abundant at the eruption of 1848, 
sparingly in that of 1 
Gvaxo—Prof. C. U. Shepard has given names to t portions s of the har- 
dened or = “ petrified” potatoes i en in the Soca Sea (Am. J. Sei, Pa 
XXil, 96) ing ony collectively pyroguanite minerals. He remarks that the guano 
se jected to th 
* : zp etertee 0 
* ed waters. The same kind covers unhardened - gigind Boies ee 
Pay rose i i i e 4 
ish color, he has named pyroclasite, the name alluding ‘a its fying to pieces when 
ated. t, J ‘4, consi 
of lime and 10 p. c. of water; while the remainder is made up of a little fiesta 
Matter, Moh er of lee cl Meee adh lime, sulphate ar z soda ger traces of chlori 
