(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
                         strongly heated, oxygen.

  (2) in open tube. —­

  (3) on charcoal. —­

  (4) in forceps.  V. Colors flame faintly green(Ba) and red
                         towards the point (Ca).

  (5) in borax.  As pyrolusite.

  (6) in mic. salt.  As in borax.

  (7) with carb. soda.  As pyrolusite.

  (8) Special reactions. —­

* * * * *

Mineral.  Wad

Formula. [..Mn],[.Mn],[.H], also [...Fe=],[...Al=],
                         [.Ba],[.Cu],[...Pb],[...Si], etc.

Behavior

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

  (2) in open tube. —­

  (3) on charcoal. —­

  (4) in forceps.  V. Colors flame variously according to its
                         composition.

  (5) in borax.  Gives the manganese reaction, more or less
                         modified by the presence of other oxides.

  (6) in mic. salt.  As in borax.

  (7) with carb. soda.  As pyrolusite.

  (8) Special reactions.  Various according to composition.  When strongly
                         heated and then moistened has an alkaline
                         reaction on red litmus paper.

* * * * *

Mineral.  Rhodonite

Formula. [.Mn]^{3}[...Si]^{2}.

Behavior

  (1) in glass-bulb.  Gives off more or less water.

  (2) in open tube. —­

  (3) on charcoal.  Under a strong flame fuses to a brown opaque
                         bead.

  (4) in forceps.  II.  As on charcoal.

  (5) in borax.  In the oxidizing flame gives the manganese
                         reaction.  In reducing flame the iron reaction.