a. [.K][.....N]

Behavior

(1) in glass-bulb. Fuses readily to a clear liquid and with a
strong heat boils with the evolution of oxygen.

(2) in open tube. --

(3) on charcoal. Deflagrates leaving a saline mass, which is
absorbed into charcoal and gives a sulphur
reaction on silver.

(4) in forceps. On platinum wire fuses and colors the flame
violet more or less modified by lime and soda.

(5) in borax. --

(6) in mic. salt. --

(7) with carb. soda. --

(8) Special reactions. With bisulphate of potassa in the glass-bulb
evolves nitrous fumes.

* * * * *

Mineral. Polyhalite

Formula. [.K][...S]+[.Mg][...S]+2[.Ca][...S]+2[.H]

Behavior

(1) in glass-bulb. Gives off water.

(2) in open tube. --

(3) on charcoal. Fuses to a reddish bead, which in the reducing
flame solidifies and shrinks to a hollow crust.

(4) in forceps. On platinum wire fuses and colors the flame
yellow from a small quantity of soda.

(5) in borax. Dissolves with ebullition to a clear glass,
which is slightly colored by iron, and when
saturated become opaque on cooling.

(6) in mic. salt. As in borax.

(7) with carb. soda. Fuses. The alkalies are absorbed by the charcoal
leaving the lime and magnesia infusible on the
surface.

(8) Special reactions. The alkaline mass when laid on silver gives a
sulphur reaction.

* * * * *

SODA.

* * * * *

Mineral. Rock-salt

Formula. NaCl.

Behavior

(1) in glass-bulb. Fuses to a clear liquid

(2) in open tube. --

(3) on charcoal. Fuses, is absorbed by the charcoal and partially
volatilized incrusting the charcoal around.

(4) in forceps. Fuses with great ease and colors the flame
yellow.

(5) in borax. --

(6) in mic. salt. --

(7) with carb. soda. --

(8) Special reactions.