40 
‘saloon, on account of its pure green colour; and the 
Nat”iiist * scarce sky blue velvet copper ore. — Phos¬ 
phate of copper from Nassau and Hungar}^— Mu¬ 
riate of copper, cr)’sta]lized and laminar: to 
' which also belongs what is called green sand of 
Peru, or atacamite, from being found in the desert 
, 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 different arscniates of 
copper, namely, the foliated arseniate, or copper mica, 
the lenticular arseniate, or lentil ore, and the olive 
ore of Werner, v/hich are formed into five distinct 
species by some mineralogists; to which is added a 
specimen of the martial arseniate of copper. (A 
greater variety of arseniates of copper will be found 
in the collection of British minerals: Cornwall.) 
{Case 36.) contains ores of iron, viz. native 
iron, arsenical pyrites (also called arsenical iron, and 
mispickle, a variety of which is argentiferous,) and 
common iron pyrites, with its various crystalline 
modifications derived from the cube, which is either 
’ smooth or striated. The most interesting speci¬ 
mens deposited in this case are those of native iron, 
and the stones called aerolites, because they have 
fallen from the atmosphere, or meteoric stones, be¬ 
cause they are by some supposed to be depositions 
from meteors. The specimens of the former are, 
—native iron from Gross-kamsdorf, in Saxony;— 
two small polished pieces of the mass found in 
^ Southern 
