: 
P 
June 15th, oe a 66°42, Boek H 374 
Ninth Supplement to Dana's Mineralogy. 363 
HORNESITE. ee has given this —_ to a new hydrated arseniate of . 
magnesia from the Banat, first observed and r ized as a new species by Dr. 
granular calcite. Crystalline form, monoclinic. The folie are dee et optically 
peel he on cleavage surface pearly; folix, flexible; H.=0 
474, cording to von Hauer it is insoluble in water, but ‘easily coluble i in seid 
Composi sitio on: 
a i 
24°54 29°07==99°94 
giving exactly the ape: 8Mg tei or Mg? As-++8H, analogous to the general 
formula R* As-+-8H for pee Baiting k6ttigite and symplesite.—(Kenngott, 
Uebersicht, 1859, 1 
HyYDROMAGNESITE [45 6].—P. Meyer de escribes an impure variety of hydromagne- 
site as occurring at Kaiserstuhl in Baden.—( Ann. der Chem. und Phar., exv, 129.) 
Kao [p. 249, V].—Analysis by A. Knop in Jahrbuch fiir Mineralogie, 1859 
573: 
Bi Al H 
49°92 85°28 tr. 14°85=100°00 
AMOHALITE [p. 382].—Analysis of bet so-called keramohalite from Maderan by 
Schweizer (Kenngott, Uebersicht, 1859, 12): 
S a ee a ee Oe oe 
35°96 1055 374 251 106 058 022 027 412 tr. 4426 
(*) With some ammmonia. 
8 dc. 
lar m 
Poi {p, 237, VII, Pari = 4g white feldspar from Radauthal in the Harz 
examined by R a con 
‘ydeais sabe Schweizer’s experiments to be a mixture of alum, with ls. Ma, herd 
nngott shows that Stromeyer’s mangan-magnesia-alum m 
a 
: ea Mg Na kK Ign. 
G==2'8tT. 51° 00 2951 1129 O28 314 209 2-48=99°79 
Is essentially labradorite. ie ai der deutschen geolog, Gesellsch., xi, 101, in 
Kopp’s hresbericht, 1859, 
Larts-Lazuut es Berg: as described a variety of la “4 -lazuli 
from Goauin ny hi eh which eng ns strongly on heating —(Bull. de la Soe. 
Géologique, ‘st xvii, 432.) 
Leap [p. 17, III, 1V].—C. v. Reichenbach has found ace piece in small globules 
in a variety of sicaiee tufa at Rautenberg i in northern Moravia.—( Verha ndl. d. k. k. 
geolog. Reichsanstalt, in Kopp’s Jahresbericht, 1859, 769. 
Levorre [p. 231, III, V, VIj.—Bergemann (Jour. prakt. Chem , lxxx, 418) 
describes a pseudomorph of cea from Miscokote = enthel which occurs in perfect 
B. 
> aeechdr yt H,=5'5; Sp. gr. =2°5 acts like irthl : DB pigs 
€composed by prolonged data in chlotegiiae — = one case 5°94 
taken u % Composition of 
Meg K Na 
60 46 22-11 1 98 1:22 13°53 0°52—==99°82 
Loss by ignition 1-22 pr. ct. re 2 ew mineral has the oxygen ratio 1:38-1:94 
or meh es of an Cigodanayit the soda is ot net by potash. 
Liserueyire ETHENITE [p. 420, VITI].— “Mercedes” mine near 
po arene eee with tagilite ae imonite. Tt me a ada Sng fp color and 
on, according to F. Field (Chem, Gazette, 
izeaux has proved this wage be a pseudomorph by an 
examination of of it its tial Prop properties. (2¢ Memoire 
