02 
natural history. (Minerals.) 
[north 
formerly called capillary iron-pyrites (haarkies W.), and afterwards 
considered as native nickel, till its real composition was determined 
by Arfvedson, from Joachimsthal and Merthyr Tydvil ; — the gersdorffite, 
a sulph-arseniuret nickel Sulphuret of cadmium , lately discovered 
at Bishoptown in Renfrewshire, and to which the name of greenock - 
ite has been given : one of the crystals here deposited (presented 
by Earl Cathcart) well exhibits the peculiar adamantine lustre of this 
substance. 
Case 7. Sulphuret of copper , copper glance , or vitreous copper , 
variously crystallized, foliated, compact, &c. , chiefly from Cornwall ; 
to which are also commonly referred the vegetable fossil remains 
(Cupressites Ullmanni, Room I. Wall Case 6) known by the name 
of Frankenberg corn-ears, from the bituminous marl-slate of Franken- 
berg in Hessia, which are principally composed of vitreous and grey 
copper:— -the sulphuret called copper indigo, and the digenite of Breit- 
haupt, being varieties of copper glance. — The silver-copper glance of 
Stromeyer, called stromeierite by Beudant. 
Sulphuret of copper and iron , to which belongs the chalcopyrite, 
copper pyrites or yellow copper, including the pale-yellow fine-grained 
variety called hematitiform, or blistered copper-pyrites ; and the varie- 
gated copper ore ( huntkupfererz and hornite ), differing from the former 
in the proportions of its constituent parts, and easily known by the 
reddish colour of its fractural surfaces : crystallized, massive and foliated. 
— Tennantite , by some referred to fahl ore, or grey-copper ore, from 
Cornwall. 
Case 8 contains a suite of specimens of sulphuret of lead or galena , 
which include a great variety of modifications of crystals, detached and 
grouped together, (the more remarkable modifications, besides those of 
Great Britain, from the Hartz and from Saxony,) in combination with 
blende, pyrites, and many other substances ; galena of various grain, 
massive and disseminated ; galena of corroded appearance, decomposed 
and regenerated ; the compact and specular variety, called slickenside 
by the Derbyshire miners, &c. — steinmannite, probably a distinct anti- 
in onial sulphur salt, is placed here, because several compact varieties of 
sulphuret of lead appear to be a mixture of it and common galena. 
Case 9. Sulphuret of bismuth , or bismuth-glance ( bismuthine of 
Beudant), in acicular crystals, from Riddarhyttan, &c . — Sidphuret of 
copper and bismuth , called copper-bismuth , from Wittichen, in the 
Black Forest.— The needle-ore of Werner, a triple sulphuret of bis- 
muth, lead, and copper, only found near Ekatherineburg, in Siberia, 
accompanied by native gold, &c — Sulphuret of copper and tin , or 
tin-pyrites , only found in Cornwall : it is called bell metal ore on ac- 
count of its colour, which is frequently that of bronze. The remainder 
of this case is taken up by a considerable suite of specimens of sul- 
phuret of mercury or cinnabar , (chiefly from Almaden, in Spain, and 
from the Palatinate,) divided by Werner into the dark-red (by far the 
most common variety), and the bright-red cinnabar (native vermilion, 
much esteemed by painters); the idrialine-cinnabar , or brand-erz , a 
mixture of cinnabar with the bituminous substance called idrialine, and 
earthy particles, from Idria, in Carniola, compact and slaty : the same 
with globular bodies composed of concentric testaceous laminae, being 
the korallenerz (coral ore) of Werner. 
