Press the drug firmly and percolate slowly with ether, added in successive portions until the drug is exhausted. Recover the greater part of the ether from the percolate by distillation on a water-bath, and, having transferred the residue to a capsule, allow the remaining ether to evaporate spontaneously. Description and History. It is a clear, thickish, deep-brown liquid, having the sharp pungency and the flavor of ginger root. Less oleoresin is obtained from the uncoated Jamaica ginger, but it has a more pleasant flavor, a lighter color, and greater fluidity when obtained from the latter.
Acetone extracts the full amount of it.
Action, Medical Uses, and Dosage.