125 
are the pseudomorphous crystals, derived from modifi¬ 
cations of carbonate of lime. 
Case 51. Half of this Table Case is occupied by 
specimens of carbonate of lead , or white lead ore, 
among which are the delicately acicular varieties from 
the Hartz, accompanied and partly coloured by green 
carbonate of copper; the crystallized varieties from 
Siberia, Mies in Bohemia, &c. It also contains part 
of the specimens of carbonate of copper , viz. the bine 
copper , or copper azure , the more remarkable varieties 
of which are those from Chessy, and from the Bannat, 
combined with various substances ; the earthy varieties, 
some of which have been used as pigments under the 
name of mountain blue; those crystallized varieties 
which, passing from the state of blue into that of green 
carbonate, have, by Haiiy, been called cuivre carbo¬ 
nate £pigene. 
Case 52. Carbonates of copper continued: green 
carbonates; among which are the fine and rare varie¬ 
ties of fibrous malachite , in acicular crystals and of 
fibrous structure and velvety appearance, with carbo¬ 
nate of lead, &c.; and among the specimens of compact 
malachite , those characteristic and splendid ones from 
the Gumashevsk and Turja mines, in the Uralian moun¬ 
tains. 
Case 53. Arsenious acid and arseniates : the for¬ 
mer, also called arsenic bloom , or octahedral oxide of 
arsenic; but arseniate of lime is frequently mistaken for 
it, and the fine octahedral crystals, on realgar and orpi- 
ment, often seen in collections, are generally arti¬ 
ficially produced in the interior of mines.—Of arse¬ 
niates we have in this glass-case:— arseniate of lime , 
called pharmacolite , chiefly in white acicular crystals, 
from Wittichen in Suabia, and Riegelsdorf in Hessia. 
— Arseniates of iron or pharmacosiderite, which occurs 
only crystallized, chiefly in cubes (whence Werner’s 
name of cube-ore) from Cornwall;— shorodite, a sub¬ 
stance which appears to be closely allied to Bournon’s 
martial arseniate of copper.— Arseniates of copper , 
consisting 
LONG 
GALLERY. 
Nat. Hist. 
