Contractions. - Nice. Nic.

Present name. - Nickel Carbonate. NiCo3.

It is precipitated as a crystalline powder by pouring a solution of pure Nitrate of Nickel into a large excess of a solution of Bi-carbonate of Soda, collecting the precipitate, washing and drying.

Characters and Tests. - A pale greyish-green powder, which dissolves with effervescence in dilute Hydrochloric Acid, and produces a beautiful emerald-green solution, which gives a black precipitate with yellow Sulphide of Ammonium, an excess of which partially re-dissolves the precipitate, forming a dirty brown solution, and a light green precipitate with Caustic Potash.

Preporation. - Trituration.

Reference to Horn. Proving. - Annalen, iii.

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