Related entry: Pix Liquida (U. S. P.)—Tar
Preparation.—"Tar, one hundred grammes (100 Gm.) [3 ozs. av., 231 grs.]; water, two hundred and fifty cubic centimeters (250 Cc.) [8 fl℥, 218♏]; pumice, in moderately fine powder, one hundred and twenty-five grammes (125 Gm.) [4 ozs. av., 179 grs.]; stronger white wine (F. 440), a sufficient quantity to make one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]. Upon the tar, contained in a suitable vessel, pour two hundred and fifty cubic centimeters (250 Cc.) [8 fl℥, 218♏] of cold water, and triturate the mixture thoroughly; then pour off the water and throw it away. Mix the remaining tar thoroughly with the powdered pumice, and add one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏] of stronger white wine. Stir frequently during 4 hours, then transfer the mixture to a wetted filter, and, after the liquid has passed, pour on enough stronger white wine to make the filtrate measure one thousand cubic centimeters (1000 Cc.) [33 fl℥, 391♏]"—(Nat. Form.).
Action, Medical Uses, and Dosage.—(See Tar.) When used internally, the dose may range from 1 to 2 fluid drachms. Externally, it is useful in certain skin affections, requiring the effects of tar and stimulation.