Plasma Picis Liquidae.—Plasma of Tar.
Related entry: Pix Liquida (U. S. P.)—Tar
Preparation.—Take of finely powdered starch, 2 drachms; glycerin, purified tar, each, 6 ounces. Add the glycerin, warm, to the starch, stir well together, heat to 115.5° C. (240° F.), gradually add the tar, and stir constantly until thoroughly incorporated (Brady).
Action and Medical Uses.—This will be found useful as a local application to wounds, ulcers, and in several forms of cutaneous diseases.