* * * * * 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. (6) in mic. salt. As in borax, but leaves an insoluble siliceous skeleton. (7) with carb. soda. With a small quantity of the alkali fuses to a black bead. With a larger quantity forms a slag. (8) Special reactions. -- * * * * * Mineral. Diallogite Formula. [.Mn][..C]. Behavior (1) in glass-bulb. Frequently decrepitates and gives off more or less water. (2) in open tube. -- (3) on charcoal. If strongly heated and moistened has an alkaline reaction on litmus paper due to the presence of Ca. (4) in forceps. V. Frequently colors the flame slightly red. (5) in borax. Gives the manganese and iron reactions. (6) in mic. salt. As in borax. (7) with carb. soda. Forms an infusible slag. (8) Special reactions. In warm acid dissolves with much effervescence. * * * * * Mineral. Triplite Formula. ([..Mn][.Fe])^{4}[.....P]. Behavior (1) in glass-bulb. Generally gives off more or less water. (2) in open tube. -- (3) on charcoal. -- (4) in forceps. I. Colors the outer blowpipe flame green ([.....P]). (5) in borax. Gives the manganese and iron reactions. (6) in mic. salt. As in borax. (7) with carb. soda. Forms an infusible mass. (8) Special reactions. -- * * * * *