136 
LONG of mountain blue ; those crystallized varieties winch, 
QA LLL RY. p ass j n g f rom state of blue into that of green carbo- 
Nat. Hist, nate, have, by Haiiy, been called cuivre carbonate 
epigene. 
Case 52. Carbonates of copper continued: green 
carbonates; among which are the fine and rare varie¬ 
ties of fibrous malachite , in acicular crystals, and mas¬ 
sive with fibrous structure and velvety appearance, ac¬ 
companied by carbonate of lead, &c.; and, among the 
specimens of compact malachite , those characteristic 
and splendid ones from the Gumashevsk and Turja 
mines, in the Uralian mountains. 
Case 53. Arsenious acid and arseniates: the for¬ 
mer (also called arsenic-bloom , or octahedral oxide of 
arsenic) is frequently confounded with arseniate of lime, 
and the white octahedral crystals, often seen in col¬ 
lections, on realgar and orpiment, are generally arti¬ 
ficially produced in the interior of mines.—Of arse¬ 
niates we have in this glass-case:— arseniate of lime, 
called pliarmacolite , chiefly in white acicular crystals, 
from Wittichen in Suabia, and Riegelsdorf in Hessia. 
— Arseniate of iron or pliarmacosiderite , which occurs 
only crystallized, chiefly in cubes (whence Werner’s 
name of cube-ore), from Cornwall, from San-Antonio- 
Pereira, Brazil, on hydrous oxide of iron, &c.;— sfroro- 
dite, a substance which appears to be closely allied to 
Bournon’s martial arseniate of copper.— Arseniates of 
copper , consisting of the foliated arseniate or copper 
mica, the lenticular arseniate or lentil ore, and the olive 
ore of Werner, which are formed into five species by 
Bournon, and probably admit of further subdivision. To 
these also belongs the kupfersc/iaum of Werner, at 
least that from Falkenstein in Tyrol: for some other 
varieties appear to be referable to carbonate of zinc. 
—- Arseniate of cobalt, or red cobalt ore, comprizing the 
earthy ( cobalt-crust ) and the radiated (cobalt-bloom) 
varieties, from Salfeld, Allemont, &c.— Arseniate of 
lead from Cornwall, Nertchinsk in Siberia, Johann- 
georgenstadt in Saxony, &c. 
Case 
