DETERMINATION OF MINERALS. 385 
Il. MINERALS NOT ELEMENTS, THAT B.B. ON 
COAL ARE WHOLLY VOLATILE. 
1. Lustre metallic ; streak metallic. 
2. Lustre unmetallic ; streak same as color. 
Til. COMPOUNDS, OF GOLD, SILVER, COPPER, 
LEAD, TIN, MERCURY, CHROMIUM, COBALT, 
MANGANESE: yielding, on heating, a malleable, or 
liquid (for mercury ores), metallic globule, as explained 
on pages 389-393, or else affording a decisive blowpipe 
reaction, proving the presence of one or more of these 
: metals. 
A. Yielding a malleable globule B.B. on coal with, if not 
without, soda. 
. Compounds of Gold. 
. Compounds of Silver. 
. Compounds of Copper, 
. Compounds of Lead. 
. Compounds of Tin. 
Ot Co) Oe 
B. Yielding drops of mercury with soda in a closed tube. 
1. Compounds of Mercury. 
C. A decisive reaction with borax or salt of phosphorus 
for chromium, cobalt, or manganese. 
1. Compounds of Chromium. 
2. Compounds of Cobalt. 
3. Compounds of Manganese. 
IV. MINERALS OF METALLIC OR SUBMETALLIC 
LUSTRE, NOT INCLUDED IN PRECEDING 
DIVISIONS. 
1. Yielding fumes in the open tube or on coal, but not 
wholly vaporizable. 
