Barley is formed into _Pearl Barley_, by the removal of its husk or
cuticle,[519] and afterwards by being rounded and polished in a mill.
These well known granules consist chiefly of fecula, with portions of
mucilage, gluten, and sugar, which water extracts by decoction, but the
solution soon passes into the acetous fermentation; the bran of barley
contains an acrid resin, and it is to get rid of such an ingredient that
it is deprived of its cuticle. OFFICINAL PREPARATIONS. _Decoct. Hordei._
L.E.D. _Decoct. Hordei. comp._ L.D.