Gives the chlorine reactions.

* * * * *

Mineral. Natron

Formula. [.Na][..C] + 10[.H]

Behavior

(1) in glass-bulb. Fuses, with the evolution of water.

(2) in open tube. --

(3) on charcoal. Fuses, and is absorbed into the pores of the
charcoal.

(4) in forceps. Fuses and behaves as the preceding.

(5) in borax. --

(6) in mic. salt. --

(7) with carb. soda. --

(8) Special reactions. Dissolves in acid with violent effervescence.

* * * * *

Mineral. Soda-nitre

Formula. [.Na][.....N].

Behavior

(1) in glass-bulb. Fuses and if strongly heated evolves nitrous
fumes.
(2) in open tube.
--
(3) on charcoal.
Deflagrates and is absorbed into the charcoal.

(4) in forceps. Deflagrates on platinum wire, coloring the flame
yellow.

(5) in borax. --

(6) in mic. salt. --

(7) with carb. soda. --

(8) Special reactions. In a glass-bulb with bisulphate of potassa,
gives the NO^{5}-reaction.

* * * * *

Mineral. Glauber-salt

Formula. [.Na][...S] + 10[.H].

Behavior

(1) in glass-bulb. Fuses and gives off water having a neutral
reaction.

(2) in open tube. --

(3) on charcoal. Fuses, and is absorbed by the charcoal. The
saturated charcoal laid upon silver gives the
sulphur reaction

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

(5) in borax. --

(6) in mic. salt. --

(7) with carb. soda. --

(8) Special reactions. Gives the SO^{3}-reaction.

* * * * *

Mineral. Glauberite

Formula. [.Na][...S] + [.Ca][...S].

Behavior

(1) in glass-bulb. Decrepitates with the evolution of more or less
water, and when strongly heated fuses to a clear
liquid.

(2) in open tube. --

(3) on charcoal. Fuses to a clear bead, then spreads out; the
soda is absorbed and the lime l