harcoal. As the preceding.

(4) in forceps. As the preceding.

(5) in borax. As the preceding.

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

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

(8) Special reactions. As the preceding.

* * * * *

MANGANESE.

* * * * *

Mineral. Manganblende

Formula. MnS.

Behavior

(1) in glass-bulb. --

(2) in open tube. Gives off SO^{2} and becomes greyish green on
surface.

(3) on charcoal. Is slowly roasted and converted into oxide.

(4) in forceps. V.

(5) in borax. The roasted mineral gives a strong manganese
reaction.

(6) in mic. salt. In the unroasted state, dissolves with much
ebullition and detonation due to elimination of
sulphide of phosphorus. The bead then exhibits
the characteristic violet color of manganese.

(7) with carb. soda. Forms a slaggy mass, which laid on silver and
moistened, gives the sulphur reaction.

(8) Special reactions. --

* * * * *

Mineral. Pyrolusite

Formula. [..Mn].

Behavior

(1) in glass-bulb. Frequently gives off a small quantity of water
and, when strongly heated, oxygen.

(2) in open tube. --

(3) on charcoal. --

(4) in forceps. V.

(5) in borax. Gives the manganese reaction.

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

(7) with carb. soda. Forms a slaggy mass.

(8) Special reactions. --

* * * * *

Mineral. Manganite

Formula. [...Mn=][.H].

Behavior

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

(2) in open tube. --

(3) on charcoal. --

(4) in forceps. V. Exfoliates slightly.

(5) in borax. As the preceding.

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

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

(8) Special reactions. --

* * * * *

Mineral. Psilomelane

Formula. ([.Ba],[.Ca],[.Mg],[.K]) [..Mn] + [.H].

Behavior

(1) in glass-bulb. Gives off water and, when