The bark of various species of Willow. Of these, the Salix Russelliana, Bedford Willow, the

* Op. cit., p. 282.

Edin. Med. Surg. Journ., Oct. 1, 1837. Brit For. Med. Rev., April 1S36.

Salix Alba or Common White Willow, and Salix Caprea or the Great round-leaved Willow, are the most esteemed. Nat. Ord. Salicaceae. Source, Northern Europe and United States.

Med. Prop. and Action. Tonic, astringent, and febrifuge. It is best administered in infusion (oz. j. ad Aq. Oj.), in doses of fl. oz. j. - fl. oz. iij. It has been employed in Intermittent and in Neuralgic and Dyspeptic cases, but is now rarely used. Whatever benefit is to be derived from it may be more conveniently obtained from its active principle, Salicine (see that article). In simple debility it proves highly useful. Its astringency depends upon the pre-sence of a small proportion of Tannin. The decoction has been sometimes found of use in chronic skin affections, as Psoriasis.*

Dose of the powdered bark, gr. xxx. - gr. lx.