lass-bulb. Becomes opaque.

(2) in open tube. --

(3) on charcoal. As in the forceps.

(4) in forceps. Exfoliates and becomes arborescent. The
filaments glow brilliantly and fuse on the
point. Colors the flame brilliantly crimson.

(5) in borax. Resembles the preceding.

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

(7) with carb. soda. As the preceding.

(8) Special reactions. As the preceding.

* * * * *

Mineral. Barytocalcite.

Formula. [.Ba][..C] + [.Ca][..C].

Behavior

(1) in glass-bulb. As in the preceding.

(2) in open tube. --

(3) on charcoal. In powder frits together, but does not fuse.

(4) in forceps. Colors the flame green in the centre and red
towards the point.

(5) in borax. Dissolves with effervescence. In large
quantities gives a semi-crystalline bead.

(6) in mic. salt. As in borax, but the saturated bead is
milk-white.

(7) with carb. soda. Fuses, and is partially absorbed leaving the
lime on the surface.

(8) Special reactions. As witherite.

* * * * *

LIME.

* * * * *

Mineral. Gypsum

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

Behavior

(1) in glass-bulb. Turns white, giving off water and being
converted into plaster of Paris.

(2) in open tube. --

(3) on charcoal. In the reducing flame forms CaS, which has an
alkaline reaction on test paper, and gives a
sulphur-reaction when laid on silver and
moistened.

(4) in forceps. Fuses with difficulty to a bead, coloring the
flame red.

(5) in borax. Dissolves to a clear bead, which gives the lime-
reaction.

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

(7) with carb. soda. Behaves as lime. The alkaline mass laid on
silver and moistened gives the sulphur-reaction.

(8) Special reactions. Gives the sulphuric-acid reaction.

* * * * *

Mineral. Apa