38 
saloon, with common green carbonates of copper, but 
Nat. Hist, which contains much silica : a variety of it is 
the iron shot copper green,,— Dioptase, a very 
scarce substance from Siberia, also called emerald 
copper, on accou-nt of its pure green colour. — 
Phosphate of copper from Rheinbreitenbach, in 
Nassau. — Muriate of copper, crystallized and 
laminar ; to this also belongs what is called green 
sand of Peru, or atacamite, from being found in 
the desart of Atacama, between Chili and Peru, 
as sand of a small river. — The rest of this case 
is occupied by the principal varieties of the dif- 
ferent arseniates of copper, namely, the foliated 
arseniate or copper mica, the lenticular arseniate, 
and the olive ore of Werner, all comprehended 
in the five species of arseniates of copper esta- 
blished by the Comte de Bournon ; also the 
earthy arseniate, or pharmaccchalcite of some au- 
thors ; to which are added specimens of the 
martial arseniate of copper. 
(Case 32.) Contains ores of iron, viz, na- 
tive iron, arsenical pyrites (also called arsenical 
iron and mispickle, a variety of which is argenti- 
ferous), and common iron pyrites, with its va- 
rious crystalline modifications derived from the 
cube, which is either smooth or striated. — The 
most interesting specimens deposited in this case 
are those of native iron, and the stones called 
aerolites, 
