117 
light has lately been thrown by the researches of H. 
Rose), crystallized, massive, and disseminated in various 
substances. 
The remaining substances in this Case are (besides 
the sulphuret of molybdenum or molybdena-glance ), 
several of the arsenio-sulphur ets, such as the arsenical 
pyrites or mispickel (some varieties of which, containing 
accidentally admixed silver, constitute Werner’s weiss- 
ertz)\ cobalt glance , massive and crystallized in the 
form of the cube and its modifications, &c. 
In the six following Cases the oxides of the electro¬ 
positive metals are deposited. 
Case 13 contains the oxides and hydrous oxides of 
manganese , for the present only arranged according to 
their old division into foliated, compact, and earthy grey 
manganese; a remarkable variety of the latter is the 
wad , which has the property of inflaming spontaneously 
when mixed with linseed oil.—Oxide of manganese, 
zinc and iron ( franklinite ) &c.— Beudantite . 
Case 14. This and the two following Cases contain 
the oxides of iron . Specular oxide of iron or iron 
glance , among the specimens of which may be spe¬ 
cified those from Elba, remarkable on account of 
their beautiful iridescence and play of colours; the 
variety in large laminar crystals appearing like polished 
steel, from Stromboli and Vesuvius;—the micaceous 
iron ore of Werner, belonging partly to this species, 
partly to the scaly hydrous oxide;— red iron ore , di¬ 
vided into compact red iron stone and red hematite. 
Case 15. Oxydulated iron or magnetic iron stone , 
massive and of various grain, compact, crystallized, in 
serpentine, chlorite-slate, &c.; ore from the East In¬ 
dies, which yields the wootz, or salam-steel, remark¬ 
able for its hardness ; magnetic iron-sand. 
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 trans¬ 
parent 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 
LONG 
GALLERY. 
Nat. Hist. 
