45 
in the disposition of their acicular crystals; foliated 
grey manganese: compact grey manganese of va¬ 
rious forms, botryoidal, tubercular, reniform, &c.; 
earthy grey manganese, a remarkable variety of 
which is the black wad of Derbyshire and Devon¬ 
shire, which has the property of inflaming sponta¬ 
neously when mixed with linseed oil.— Silicate of 
manganese^ &c. 
[Case 41.) In this and the two following cases 
are contained the ores of lead, the most common 
and useful of which is the sulphur et of lead^ or ga¬ 
lena'. the specimens here deposited include various 
modifications of crystals, detached, and grouped to¬ 
gether, in combination with blende, pyrites, and 
many other substances; galena of various grain, 
massive and disseminated; galena of corroded ap¬ 
pearance, decomposed and regenerated; the com¬ 
pact and specular variety, called slickenside by the 
Derbyshire miners.—With these is also placed the 
antinionial sulphur et of lead^ or triple sulphuret of 
lead, antimony, and copper, called endellion by 
Count Bournon. [See British Collection: Corn¬ 
wall.] 
[Case 42.) Ores of lead continued:—the more 
prominent specimens in this case are those of car¬ 
bonate of lead, or white lead, 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 
SALOON. 
Nat. Hist. 
green 
