155 
gallery.] natural history. 
10th, 1825 ;—three entire stones and a fragment, of those 
that were seen to fall, October 13th, 1838, at Old Bok- 
keveld, at the Cape of Good Hope. (See Philos. Transact, 
for 1839.) 
Among the specimens of native copper (which presents 
a great variety of forms besides the crystallized, such as 
dendritic, filiform, &c.) may be specified the mass from 
Hudson’s Bay, found by Mr. Hearne, and described by 
him in his journal.— Native bismuth , massive, disseminated, 
and dendritic, in jasper, &c.: to which are added, speci¬ 
mens exhibiting the artificial crystallization of the same, 
produced by the sudden cooling of the melted metal.— Na¬ 
tive lead in lava: to which is added a medal cast in the 
same lead which was ejected by Vesuvius in 1631. 
Case 2. Native silver : among its varieties may be par¬ 
ticularized those exhibiting the various forms in which it 
most frequently occurs, such as tooth-shaped, wire-shaped, 
dendritical, mosslike, &c., many of which are aggregations 
of minute crystals.— Native mercury, and hydrarguret of 
silver or native amalgam ; the former chiefly as globules, 
disseminated in cinnabar, sparry limestone, &c.; the latter 
crystallized in perfect and modified rhombic dodecahedrons, 
globular, &c.: to which are added figures and ornaments 
moulded and modelled in amalgam, by the miners of 
Mexico. — Native platinum , massive and as grains: rock 
specimens of the formation in which it occurs in the 
Ural, Siberia.— Palladium and osm-iridium , in a wrought 
state. 
Case 3. Native gold, subdivided into pure and alloyed 
gold; the former chiefly massive, in detached crystals and 
as grains (from Bengal, Guinea, Sumatra, Brazil), and in 
brown iron-stone, in quartz, with needle-ore, &c., from 
Siberia; the alloyed gold (principally from Transylvania) 
crystallized in minute cubes and octahedrons variously 
aggregated, in reticular plates, &c. With these are placed 
a few specimens of the alloys known by the names of au¬ 
riferous silver and electrum . 
In this Case begin (continued to Case 12) the electro¬ 
negative metallic substances (metalloids), and their not 
oxidized combinations.— Tellurium and tellurets: the 
scarce native tellurium, which (like sulphur and sele¬ 
nium) has the property of mineralizing several metals. 
