Contractions. - Ammiac. Am.-g.

Dorema Ammoniacum. Nat. ord., Umbelliferae:.

Gum Ammoniac. For. names: German, Ammoniak; French, Gomme Ammoniaque; Italian, Armoniaco; Spanish, Goma Ammoniaco.

Habitat. - Persia and the Punjaub.

Part employed. - The gum resin which exudes from the stem.

Characters. - In tears or masses; the tears from 2 to 8 lines in diameter, pale cinnamon brown, breaking with a smooth, shining, opaque, white surface; the masses composed of agglutinated tears, hard and brittle when cold, but readily softened by heat. Has a faint odour, and a bitter, acrid, nauseous taste. Rubbed with water, it forms a nearly white emulsion. It is partially soluble in ether and alcohol.

Preparation. - Trituration.

Reference to Horn. Proving. - Marcy and Peters' New Mat. Med.

Proper forms for dispensing. - 1x to 3, Trituration only. 4, dilute Tincture only. 5 and upwards, Tincture, Pilules, or Globules.