67 
gallery.] natural history. (Minerals.) 
variety called asparagus-stone, ixom the Greiner in Tyrol, and particularly 
the specimens from Jumillain 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 Gromford Level, near 
Matlock. ^ 
To the silicates with chlorides are referred the sodalite, of w'hich, how¬ 
ever, some varieties stand in need of more accurate chemical examina¬ 
tion ;—the eudialyie, which occurs in West Greenland, accompanied by 
the preceding mineral substances;— i\iQpyrosmalite,ixom the iron mines 
of Nordmark, in Wermeland, massive and in perfect crystals. 
Case 58 contains thQ fluorides, of which by f»r 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 fluor, &c., chiefly from Derbyshire 
and Saxony, are arranged in Case 59.—The very scarce fluoride of 
aluminum, from Cornwall, called fiuellite.—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 pxjrophysalite 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 ihe 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 1 yrol, the 
blue and violet from Ischelin Upper Austria; thestalactical 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-carbonate of lead {pkosgenite) 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 Remohnos, Solidad and 
Veta negra della Pampa larga, in Chili;—what was 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 
