104 
NATURAL HISTORY. 
[long 
hardness; magnetic iron-sand- With the oxides of iron is 
also provisionally placed the crucite of Thomson; and the 
beudantite , which is composed of the oxides of iron and 
lead. 
Case 16. Hydrous oxide of iron or brown iron-stone, 
among the most remarkable varieties of which species are, 
the micaceous., called goethite, in delicate transparent 
tables of a blood red colour ; that in fine scales coating the 
cells of lava; a shining brownish-black variety used as hair 
powder by the Bootchuana natives beyond the Great River 
in South Africa; the fibrous brown iron-stone or brown 
hematite ; the compact and the ochrey brown iron-stone— 
and., as appendix to it, the argillaceous or clay iron-stone, 
with its many varieties, such as the columnar, pisiform, 
reniform clay iron-stone, the meadow-ore, &c 8 
Case 17. Oxide of copper ;—red or ruby copper ore, 
compact, foliated, and fibrous; one of the more remark¬ 
able is the bright-red capillary variety from Rheinbreiten- 
bach in Nassau, and the Bank mines in Siberia;—the 
ferruginous red oxide of copper or tile-ore, a mixture of 
red copper and brown iron ochre; black oxide or copper 
black, generally mixed with the oxides of iron and man¬ 
ganese.— Oxide gJ lead the native minium from Hessia 
(first described by Mr. Smithson), from Siberia, &c., pro¬ 
bably produced by the decomposition of galena.— Oxide of 
bismuth or bismuth ochre from Saxony and Bohemia.-— Oxide 
of zinc or red zinc ore from New Jersey.— Black and yellow 
earthy cobalt , both called cobalt ochre, which seem to be hy¬ 
drates of the oxides of cobalt and manganese, frequently 
mixed with oxide of iron.— Oxide of uranium, or uran-ochre , 
and the hydrous protoxide of the same, called pitch ore . 
Case 18. Oxide of tin or tin-stone, divided by Werner 
into common tin-stone and wood-tin: among the speci¬ 
mens of the former (chiefly from Cornwall, Saxony, and 
Bohemia) may be specified the greyish-white crystals re¬ 
sembling scheel-ore or tungstate of lime, the regular and 
macled crystals, the pebble-like and granular tin-stone 
(shoad-tin, stream-tin, grain-tin, &c.), the columbiferous 
oxide of tin from Finbo in Sweden ; fibrous oxide or wood- 
tin, a variety of which, composed of radiated-fibrous small 
globules, and marked with concentrically disposed brown 
and yellow colours, is called toad’s eye wood-tin. 
