Extractum Buchu Liquidum, B.P.C. Liquid Extract of Buchu.

Format explanation.
Related entries: Buchu

Buchu Leaves, in No. 40 powder 100.00 | 20 ounces
Alcohol ... to 100.00 | to 20 fl. ounces

Add 40 (8 fluid ounces) of the alcohol to the drug, pack the mixture in a percolator, saturate it with alcohol, and, after allowing to stand for forty-eight hours, percolate until exhausted. Reserve the first 85 (17 fluid ounces) of percolate, recover the alcohol from the subsequent percolate by distillation, evaporate, dissolve the resulting soft extract in the reserved percolate, and add sufficient alcohol to make up to the required volume.
Dose.—3 to 12 decimils (0.3 to 1.2 milliliters) (5 to 20 minims).

The British Pharmaceutical Codex, 1911, was published by direction of the Council of the Pharmaceutical Society of Great Britain.