134 
LONG 
GALLERY. 
red silver under the name of hemiprismatic ruby- 
blende ;—the sulpho-salt commonly called brittle 
silver (the roschgewachs of the Hungarian 
miners) * appears to be composed of the 
same constituent elements as the dark and the 
bright red ruby-silver ores, but in different pro¬ 
portions ;— bournonite , a sulpho-salt known also 
by the names of endellione, and triple sulphuret 
of lead, antimony and copper ;—and in the 
next case, 
Case 11 . The grey copper or fahl-ore, (a 
double sulpho-salt, on the chemical constitution 
of which some light has lately been thrown 
by the researches of H. Rose,) crystallized, 
massive, and disseminated in various substances. 
The remainder of the substances in this glass- 
case cannot be specified till some necessary ad¬ 
ditions have been made to its contents. 
In the six following cases the oxides of the 
electro-positive metals are deposited. 
Case 12 contains the oxides and hydrous 
oxide of manganese , for the present only arranged 
according to their old division into foliated, 
compact, and earthy grey manganese \ a remark¬ 
able 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. 
* It is placed ill the next glass case, No. 11. 
CaIse 
