GALLERY.] 
NATURAL HISTORY. 
193 
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. 
Case 60 contains the chlorides.—Chloride of sodium 
(muriate of soda), or rock salt: the most interesting speci¬ 
mens here deposited of this important mineral substance 
are the crystallized varieties,* the massive and fibrous 
coloured varieties, the red chiefly from Hallein in Tyrol, 
the blue and violet from Ischel in Upper Austria; the 
stalactical rock salt from Mexico, &c.— Chloride of am- 
monium or sal-ammoniac, from Vesuvius, Saint Etienne en 
Forez, &c.— Chlorides of lead : to these belong, the co- 
iunnite from Vesuvius; the basic muriate of lead from 
Mendip; and the murio-carhonate of lead from Derby¬ 
shire, of which most rare substance very perfect specimens 
are deposited in this glass Case.— Chloride of copper or 
atacamite, in crystallized splendid groups, chiefly from 
Remolinos, 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 
produced by pounding the crystallized and laminar varieties 
for the purpose of using the sand (arenilla) in lieu of 
blotting paper. — Chloride of silver , called also horn- 
silver and corneous silver : amorphous, botryoidal, in 
laminae, and crystallized in minute cubes and octahedrons, 
from Veta Negra in Chili, the Saxon Erzgebirge, &c. 
—Chloride of mercury, or horn-quicksilver, with native 
mercury from Moschel-Landsberg, Almaden, &c. 
Case 61 contains a small collection of organico-che- 
mical, or such mineralized substances as are composed 
after the manner of organic bodies, from which they derive 
their origin. They are divided into salts, resins, bitumen, 
and coal. To the salts belong—the mellate of alumina , 
also called mellite or honey-stone, found in the beds of 
brown coal at Artern in Thuringia; and the oxalate of 
iron, formerly known by the name of resinous iron, but to 
which that of humholdlite is now generally applied.—To 
the resins may be referred—the amber, of the varieties of 
K 
