The concrete exudation obtained by incisions from the stem of Fraxinus Ornus et Rotundifolia. The European Flowering Ash. Nat. Ord. Oleaceae. Linn. Syst. Diandria Monogynia. Source, Southern Europe and the islands of the Mediterranean, &c. There are several kinds of Manna met with in commerce; the best is the flake Manna.
Med. Prop. and Action. Laxative. From its sweet taste and general mild action, it is well adapted for children: but it is apt to cause griping and flatulence. It is a good adjunct to Senna and the neutral salts, to cover their nauseous taste. It consists chiefly of a peculiar sugar termed Mannite (C6H7O6). It contains, besides, a small amount of bitter matter.
Dose, gr. lx. - oz. ss.
* Lancet, March 5, 1864. Pharm. Journ., vol. v. p. 27.