36 
saloon, rock salt, &c.— Polyhallite of Stromeyer, a che- 
n,vi. Hist, niical combination of several salts, formerly con¬ 
sidered as anhydrous sulphate of lime. 
{Case 28.) contains various saline minerals, among 
the more remarkable of which are the fibrous sul¬ 
phate of magnesia and soda, from Calatyud in Ar- 
ragon, and the blue salt with glauberite from Aran- 
juez in Spain. 
In the glazed table-cases and drawers on the right 
hand side of the principal entry from the first room 
into the Saloon, are deposited the Metallic ores. 
(Case 29.) The ores of platina, gold, and mer¬ 
cury.— Platina in grains from Peru and Brazil: 
the latter mixed with grains of greyish yellow gold. 
Palladium. — Iridium.—Native gold, subdivided 
into pure and alloyed gold; the former chiefly mas¬ 
sive and as grains (from Guinea, Bengal, Sumatra,) 
and in brown iron-stone, in quartz, with needle 
ore (acicular sulphuret of bismuth, &e.) from Sibe¬ 
ria ; the alloyed gold (principally from Transylva¬ 
nia) crystallized in minute cubes and octohedrons 
variously aggregated, in reticular plates, &c.—The 
ores of mercury in this case are:—the sidphurets, 
consisting of dark red cinnabar (by far the more 
common variety) massive, crystallized, and in com¬ 
bination with various mineral substances ; the bright 
red cinnabar (native vermilion, much esteemed by 
painters) ; the hepatic mercurial ore from Idria, 
compact and slaty ; the former also with petrifac¬ 
tions 
