gallery.] natural history. (Minerals.) 67 
variety called asparagus-stone, from the Greiner in Tyrol,and particularly 
the specimens from J'umillain Murcia; the Norwegian apatite called mo- 
roxite; also the phosphorite or fibrous and compact phosphate of lime, 
and the pulverulent variety, known by the name of earth of Marmorosh, 
which was formerly considered as a variety of fluoride of calcium (fluate 
talcapatite of lime).—The only carbonate found combined with a 
chloride is the horn-lead, or chloro-carhonate of lead: the unique suite 
of crystals deposited in this Table Case is from Cromford Level, near 
Matlock. 
To the silicates with chlorides are referred the sodalite , of which, how¬ 
ever, some varieties stand in need of more accurate chemical examina¬ 
tion;— the eudialyte , which occurs in West Greenland, accompanied by 
the preceding mineral substances;—the pyrosma lite, from the iron mines 
of Nordmark, in Wermeland, massive and in perfect crystals. 
Case 58 contains the fluorides , of which by far the most important 
species is the fluoride of calcium, generally called fluate of lime and 
fluor-spar: among its numerous varieties may be particularized, the 
rose-coloured crystals from Chamouni; the phosphorescent massive 
fluor-spar, called chlorophane, from Siberia; the varieties called forti- 
fication-fluor; earthy and compact fiuor, &c., chiefly from Derbyshire 
and Saxony, are arranged in C*se 59.—The very scarce fluoride of 
aluminum, from Cornwall, called fluellite.—Fluoride of calcium, yttrium , 
and cerium; — yttrocerite; and some related minerals from Finbo and 
Brodbo near Fahlun in Sweden .—Fluoride of sodium and aluminum , 
called cryolite , found in West Greenland : pure and mixed with brown 
iron-stone, galena, &c.;—the chiolite , from the Ural. 
Case 58 A, is appropriated to some of the silicates containing fluo¬ 
rides :—to these belongs the topaz , here illustrated by a considerable 
series of crystals of Saxon, Brazilian, and Siberian varieties, among which 
there are several new modifications; Saxon varieties embedded in the 
topaz rock, an aggregate of topaz, shorl, quartz, and sometimes mica ; 
Brazilian topazes, yellow and pink, embedded in rock crystal, &c. 
-—Also the pyrophysalite from Fahlun in Sweden, and the pycnite , 
formerly considered as a variety of beryl, are referable to topaz;— 
the chondrodite (maclurite, brucite)from New Jersey, and from Pargas 
in Finland; and some varieties of mica and lepidolite, ( Case 32,) likewise 
contain fluoric acid. 
Case 59 contains the chlorides.—Chloride of sodium (muriate of soda), 
or rock salt: the most interesting specimens here deposited of this im¬ 
portant mineral substance are, the crystallized varieties; the massive and 
fibrous coloured varieties, the red, chiefly from Hallein in Tyrol, the 
blue and violet from Ischelin Upper Austria; thestaiactical rock salt from 
Mexico, &c .—Chloride of ammonium or sal-ammoniac , from Vesuvius, 
Saint Etienne en Forez, &c .—Chlorides of lead: to these belong—the 
cotunnite from Vesuvius ; the mendipite or basic muriate of lead from 
Mendip ; and the murio-carbon ate of lead ( phosgenite ) from Matlock in 
Derbyshire, of which most rare substance a very perfect suite of speci¬ 
mens will be found in Case 57 B. — Chloride of copper or atacamite, 
in crystallized splendid groups, chiefly from Remolinos, Solidad and 
Veta negra della Pampa larga, in Chili;—what w 7 as originally termed 
Peruvian green sand, or atacamite, (being obtained from the desert of 
Atacama between Chili and Peru,) is now known to be artificially pro¬ 
duced by pounding the crystallized and laminar varieties for the purpose 
