Liquor Rusci, B.P.C. Solution of Birch Tar Oil.
Related entry: Birch Tar Oil
|Birch Tar Oil||10.00|||||2 fl. ounces|
|Quillaia Bark, in No. 20 powder||10.00|||||2 ounces|
|Alcohol||to 100.00|||||to 20 fl. ounces|
Moisten the quillaia bark with 5 (1 fluid ounce) of the alcohol and complete the percolation process, to produce 90 (18 fluid ounces) of the tincture; add the birch tar oil and allow to stand for two days, shaking occasionally, decant the supernatant liquid.