43 
decomposed and regenerated; the compact and 
specular variety, called slickenside by the Derby¬ 
shire miners.—With these is also placed the anti- 
monial sulphuret of lead, 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 car¬ 
bonate of lead, or white leach among which may be 
particularized the laminar varieties, the beautiful 
modifications from Siberia, and the crystallized aci- 
cular 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 con¬ 
sidered as carbonates, but which, according to 
analyses lately published, are, sulphato-carbonate, 
sulphato-tricarbonate, and cupreous sulphate of 
lead.—Phosphates of lead, which are divided by 
Werner 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 phos¬ 
phate, massive, botryoidal, spicular, &c.; variously 
crystallized; of various shades of green, passing into 
greenish white, into yellow and orange; with ferru- 
SALOON 
Nat. Hist 
girious 
