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 consists of Castile soap, camphor, and oil of rosemary, dissolved in alcohol diluted with one-eighth of its measure of water. It is a clear liquid, and is very much used as an anodyne and gently rubefacient liniment, in all the outward pains for which camphor is locally employed. (Seepages 704-5 ) To render it more anodyne, it may be mixed with an equal measure of laudanum, constituting the Anodyne Liniment or Linimentum Oph of the British Pharmacopoeia; and, if stronger rubefacient properties are required, stronger solution of ammonia may be incorporated with it in the proportion of one-fourth by measure. The latter preparation may be used as an effective rubefacient in pectoral inflammation, angina,laryngitis, and tonsillitis.