Liquor Rusci, B.P.C. Solution of Birch Tar Oil.
Botanical name:
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.
