Contractions. - Mang-c. Mn-c.

Present name. - Manganous Carbonate. MnCo3.

Carbonate of Manganese.

Prepared by precipitating a solution of pure Proto-sulphate of Manganese with Carbonate of Soda. Collect the precipitate on a calico filter and wash with distilled water until the filtrate ceases to give a precipitate with Chloride of Barium.

Characters and Tests. - A brownish-white powder, soluble in acids with effervescence. The acid solutions give with Caustic Potash a white precipitate, which becomes brown on exposure to the air; and with Sulphide of Ammonium a characteristic flesh-coloured precipitate, which is readily soluble in Hydrochloric and Nitric Acids. No blue precipitate is given on the addition of the yellow Prussiate of Potash.

Preparation. - Trituration.

Reference to Horn. Proving. - Chr. Kr., iv.

Proper forms for dispensing. - lx to 3, Trituration only. 4, dilute Tincture only. 5 and upwards, Tincture, Pilules, or Globules.