GALLERY.] NATURAL HISTORY. 157 
The system adopted for the arrangement of the Minerals, 
with occasional slight deviations, is that of Berzelius, 
founded upon the electro-chemical theory and the doctrine 
of definite proportions, as developed by him in a memoir 
read before the Royal Academy of Sciences of Stock¬ 
holm. The detail of this arrangement cannot here be 
entered into : it will, however, be partly supplied by the 
running titles at the outsides of the glass Cases, and by the 
labels within them. 
The first two Cases, and part of the third, contain the 
electro-positive native metals: iron, copper, bismuth, lead, 
silver, mercury, palladium, platinum, osmium and gold. 
Case 1. Of native iron , found in insulated masses, and 
disseminated in meteoric stones, the following specimens 
are deposited;— native iron from Gross-Kamsdorf in Sax¬ 
ony;—two small polished pieces of the mass found in 
Southern Africa, which weighed about 250 pounds, and is 
now in the cabinet of Haarlem;—fragment of the iron 
from Senegal;—specimens of the native iron from Otumpa, 
in the Gran Chaco Gualamba, in South America, described 
by Don Rubin de Celis, who estimated the weight of the 
mass to be about 300 quintals, or 15 tons *;—a large piece 
detached from the celebrated mass of Siberian native iron, 
which was discovered by Pallas on the summit of a hill be¬ 
tween Abakansk and Belskoi Ostrog on the banks of the 
Jenisey, where it was considered by the Tartars as a sacred 
relic: the mass originally weighed about 1680 pounds;— 
a mass of iron from Atacama, resembling that of Siberia, 
and also containing much of the olivine-like substance 
within its cells;—a piece of the large mass from Ellen- 
bogen, in Bohemia, and another of that found on the Col- 
lina di Brianza, in the Milanese;—two specimens of the 
mass of iron found at Lenarto in Hungary, one of which 
(being polished and treated with acid) exhibits the outlines 
of imperfect crystals ;—a small piece of the large mass in 
the Capitania di Bahia, Brazil;—another, from that found 
in the province of Durango, Mexico;—a portion of the 
mass from Zacatecas, Mexico, described by Humboldt;— 
a specimen detached from the large mass of iron preserved 
* The large mass of iron placed against the wall under the window in 
Room I., was sent from Buenos Ayres, by Sir Woodbine Parish; it is 
supposed to be part of that of Otumpa ; its weight 1400 pounds. 
