386 DETERMINATION OF MINERALS. 
A. Streak metallic. 
B. Streak unmetallie. 
a. Fumes sulphurous only. 
b. Fumes arsenical, with or without sulphurous. 
* Not yielding fumes of any kind; streak unmetallic. 
A. B.B. easily fusible, giving a magnetic bead ; lustre sub 
metallic. 
B. Infusible, or nearly so. 
a. Reaction for iron ; anhydrous. 
b. Reaction for iron ; hydrous. 
c. Reaction for chromium or titanium. 
d. Reaction for csmium with nitre. 
V. MINERALS OF UNMETALLIC LUSTRE. 
1. Having an acid, alkaline, alum-like, or styptic taste. 
. CARBONATESS : Taste alkaline ; effervescing with HCI. 
. SULPHATES: No effervescence ; reaction for sulphur 
with soda. 
. NITRATES: With sulph. acid, reddish acrid fumes ; 
no action with HCl; defiagrate. 
. CHLORIDES: With sulph. acid, acrid fumes of HCl; 
no fumes with HCl. 
. BORATES : No effervescence ; reaction for boron when 
moistened with sulph acid. 
es} SY eee 
Not having either of the above-mentioned kinds of 
fe 
A. CARBONATEHS : Effervescing with HCl. 
a. Infusible ; assay alkaline after ignition. 
b. Infusible; become magnetic and not alkaline, on 
ignition. 
c. Infusible; B.B. on coal with soda, zine oxide 
vapors. 
d. Infusible ; B.B. on coal reaction for nickel. 
e. Fusible ; assay alkaline after ignition. 
B. 2 eegaiee Reaction for sulphur with soda. 
. Fusible ; assay alkaline aftcr fusion. 
5 Fusible ; reaction for iron. 
C. infusible. 
