gallery.] natural history. (Minerals.) 77 
three scarce Siberian mineral substances placed in this Case (one of 
them, the brochantite), which appear to be sub-sulphates of copper, but 
which stand in need of more accurate chemical examination.— Sulphate 
of uranium oxide or johannite, a very rare mineral substance, from Joa- 
chimsthal, Bohemia.— Sulphate of lead , lead-vitriol, or anglesite, of 
which we have a—suite of specimens with brilliant and well defined 
crystals from Bademveiler in Suabia, from the Parys mine in An- 
glesea, Szc. ; the sulphato-carbonate ( lanarkite ), and sulphato-tricar- 
bonate ( suzannite ), the cupreous sulphato-carbonate ( caledonite ) of 
lead, &c., from Leadhills, &c.— Sulphates of alumina :—common 
alum, crystallized, fibrous, &c., from various places; and the hydrous 
sub-sulphate of alumina , called aluminite , or websterite , from Sussex 
and from Halle in the territory of Magdeburg, which w*as by some 
mistaken for pure alumina, and by others for hydrate of alumina with 
mechanically admixed sulphate of lime : it must not be confounded 
with another substance, also called aluminite or alum-stone , (alunite of 
some mineralogists,) from Tolfa, &c., wdiich is a basic sulphate of alu¬ 
mina and potassa. 
In this Case are also placed some specimens of lazulite , or lapis 
lazuli (which furnishes the valuable pigment called ultra-marine)* 
—the haiiyne, and a few other of the imperfectly known silicates of 
soda, lime, and alumina combined with sulphates. 
Case 56. Arsenious acid and arseniates: the former (also called 
arsenic-bloom , or octahedral oxide of arsenic) is frequently confounded 
with arseniateof lime, and the white octahedral crystals of it, often seen in 
collections on realgar and orpiment, are generally artificially produced in 
the interior of mines.—The arseniates in this glass Case are :—arseniate 
of lime, called pharmacolite, chiefly in white acicular crystals, from Wit- 
tichen in Suabia, and Riegelsdorf in Hessia .—Arseniate of iron or phar- 
macosiderite, which occurs only crystallized, chiefly in cubes (whence Wer¬ 
ner’s name of \Viirfel-ertz), from Cornwall, from San-Antonio-Pereira, 
Brazil, on hydrous oxide of iron, &c. ;— skoroditc, a substance which 
appears to be closely allied to Bournon’s martial arseniate of copper.— 
Arseniates of copper, chiefly from Cornwall, consisting of the foliated 
arseniate or copper-mica, the lenticular arseniate or lentil-ore, and the 
olive-ore of Werner, which are formed into five species by Bournon, 
but their exact composition remains still to be ascertained by exact 
chemical analyses. The euchroite also belongs to these, and the 
hupferschaum of Werner, at least that from Falkenstein in Tyrol: for 
some other varieties bearing that name appear to be referable to carbo¬ 
nate of zinc .—Arseniate of cobalt, or red cobalt ore, comprising the 
earthy (cobalt crust ) and the radiated ( cobalt-bloom ) varieties, from 
Salfeld, Allemont, &c .—Arseniate of nickel. 
Case 57. Among the various phosphates deposited in this Case may 
be particularized —phosphate of iron , Werner’s vivianite, in variously 
grouped crystals (from Bodenmais in Bavaria, from Cornwall, from Fer¬ 
nando Po, &c.), massive and pulverulent : among the specimens of 
the latter are the massive variety of New Jersey, and several earthy 
blue varieties in clay, peat, w^ood, &c. : the chalcosiderite of Ullmann, 
Werner’s green iron earth, and Thomson’s mullicite, are likewise phos¬ 
phates of iron .—Phosphate of manganese or triplite, from Chanteloube, 
near Limoges, in the department of Haute Vienne in France, where 
