40 
SALOON, Nassau and Hungary.— Muriate of copper^ crys- 
Nat.Hist, tallized and laminar: to which also belongs 
what is called green sand of Peru, or atacamite^ 
from being found in the desert of Atacama, be¬ 
tween Chili and Peru, as sand of a small river. 
The rest of this case is occupied by the principal 
varieties of the different arseniates of copper^ 
namely, the foliated arseniate, or copper mica, 
the lenticular arseniate, or lentil ore, and the 
olive ore of Werner, which are formed into five 
distinct species by some mineralogists. (A 
greater variety of arseniates of copper will be 
found in the collection of British Minerals: 
Cornwall.) 
Case 36, and part of 37, contain, besides the 
arsenical iron (called also arsenical pyrites and 
mispikel), the sulphurets of iron, viz, the common 
smooth and striated; th^radiatedpyrites^ 
a substance very subject to decomposition, and to 
which belong most of the varieties of what is com¬ 
monly called lenticular and coxcomb pyrites, as 
also the globular pyrites of a radiated texture. 
Case 37. Sulphurets of iron continued :— 
The hepatic or liver pyrites of Werner, very dis¬ 
tinct from what French mineralogists call fer 
sulfure hepatique, which latter is decomposed 
common and radiated iron pyrites, and sometimes 
brown iron-stone.— Magnetic pyrites^ which is 
nearly allied to the preceding species : massive 
and crystallized in six-sided prisms.—The re¬ 
mainder of this table-case is occupied by part of 
the 
