394 DETERMINATION OF MINERALS: 
HAUEBRITBE, p. 188. H.—4; G.=8-48; isometric ; reddish brown, 
streak brownish-red. B.B. yields sulphur, after roasting reaction 
for manganese 
ALABANDITE, p. i88. H.—3:5-4; G.=4; submetallic, iron-black; 
streak green; B.B. on coal sulphur, after roasting reaction for 
manganese. 
Vesuvianite, epidote, axinite, ilvaite, géthite, include varieties that 
give reaction for manganese. 
IV. MINERALS OF METALLIC OR SUB- 
METALLIC LUSTRE NOT INCLUDED 
IN PRECEDING DIVISIONS. 
1. YIELDING FUMES IN THE OPEN TUBE 
OR ON COAL, BUT NOT WHOLLY 
VAPORIZABLE. 
A. STREAK METALLIC. 
MOLYBDENITE, p. 96. H.=1-1°5; G.—4:4-4°8; lead-gray, and 
leaves trace on paper ; B.B. on coal sulphurous fumes 
BISMUTHINITE, p. 102. H.=2; G.—6°4-7°2; lead-gray, whitish ; 
B.B. on coal sulphurous fumes, and yellow bismuth oxide; sol. in 
hot nitric acid and a white precip. on diluting with water 
B. STREAK UNMETALLIC. 
a. FUMES SULPHUROUS ONLY. 
PYRITE, p. 172. H.=6-6:5; G.=4°8-5:2: isometric and pyritohe- 
dral ; pale brass-yellow, streak gnh black, bnh black; B.B. on 
coal, fuses to a magnetic globule. 
MARCASITE, p. 174. H.=6-6:5; G.=—4°68-4°85 ; trimetric ; pale 
bronze-yellow ; streak gyh black, bnh black ; B.B. like pyrite. 
PYRRHOTITE, p. 174. H.=3:5-4:5; G.=44-4°68; hexagonal ; 
bronze-yellow, rdh; streak gyh black; slightly magnetic; B.B. 
fuses to a magnetic mass. 
MILLERITE, p. 164. H.=3-8:5; G.=4:6-5:7; rhombohedral, 
usually in acicular or capillary forms, also in fibrous crusts ; brass- 
yellow, somewhat bronze-like ; B.B. fuses to a globule, reacts for 
nickel. 
LINNZITE, p. 164. H.=5:'5: G.=4°8-5; isometric; pale steel- 
gray, copper-red tarnish ; streak blackish-gray ; B.B. on coal fuses 
er >) e+ ee ee 
