in the materia medica, the concreted juice of some vegetable, naturally exuding from it, soluble in water, and not inflammable.

It is a honey-like juice, brought to us from Calabria and and Sicily, sometimes in small granules, or drops of an irregular figure, roundish, oblong, crooked, and sometimes contorted. It should be chosen whitish, or at the utmost with only a faint cast of yellow, not too heavy, in regular dry granules, or in moderately long strata or flakes, of a pleasant taste, and dissolving wholly in the mouth, not leaving a farinaceous substance behind it, as much of the common manna does that has been adulterated with honey and flour.

Manna is the mildest and safest of all purges, and may be given to children, to women with child and to people of the most tender constitutions, with perfect safety; and it never fails gently to move the bowels.