This section is from the book "A Treatise On Therapeutics, And Pharmacology Or Materia Medica Vol1", by George B. Wood. Also available from Amazon: Part 1 and Part 2.
This is prepared, according to the U. S. Pharmacopoeia, by mixing equal measures of officinal alcohol and distilled water. It is not quite so strong in alcohol as the proof spirit of the British Pharmacopoeia, or as ordinary full proof brandy. It is used chiefly in the preparation of tinctures, from substances containing active principles soluble both in water and alcohol. (See page 61).