43 
generated; the compact and specular variety, 
called slickenside by the Derbyshire miners,— 
With these is also placed the antimonial sulphu- 
ret of leaf or triple sulphuret of lead, antimony, 
and copper, called endellion by Count Bournon. 
[See British Collection : Cornwall.] 
Case 42. Ores of lead continued :—the more 
prominent specimens in this case are those of 
carbonate of lead,, or white lead, among which 
may be particularized the laminar varieties, the 
beautiful modifications from Siberia, and the 
crystallized acicular white lead from the Hartz, 
accompanied with green and blue carbonates of 
copper ; the fine light-blue variety coloured by 
copper, &c.; the black lead ore of Werner, which 
appears to be merely a variety of the white lead 
ore.—With these are placed three substances 
from Leadhills, hitherto considered as carbo¬ 
nates, but which, according to analyses lately 
published, are, sulphato-carbonate, sulphato-tri- 
carbonate, and cupreous sulphate of lead.—= 
Phosphates of lead, which are divided by Wer¬ 
ner into brown lead ore, and green lead ore. 
Among the specimens of the brown phosphate, 
the most remarkable are the large six-sided 
prisms from Huelgoet in Britany, &c. 
Case 43. Ores of lead continued:— green 
phosphate, massive, botryoidal, spicular, &c.; 
variously crystallized; of various shades of 
green, passing into greenish-white, into yellow 
and 
SALOON. 
Nat. Hist. 
