Contractions. - Ferr-c. F-ca.

Present name. - Ferrous Carbonate. FeCo3.

The Ferri Carbonas Saccharata of the British Pharmacopoeia is the best preparation, and contains about 37 per cent. of the Carbonate. It must, however, be specially indicated if the Carbonate is prescribed in this form.

Characters and Tests. - Small coherent lumps of a grey colour, with a sweet, very feeble, chalybeate taste. It dissolves with effervescence in warm Hydrochloric Acid, diluted with half its volume of water, and the solution gives but a very slight precipitate with Chloride of Barium. 20 grains dissolved in excess of Hydrochloric Acid and diluted with water continue to give a blue precipitate with the red Prus-siate of Potash, until at least 208 grain measures of the volumetric solution of Bichromate of Potash have been added.

Preparation. - Trituration, using 3 grains to 7 grains of sugar of milk to make lx.

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