This section is from the book "Materia Medica And Therapeutics: An Introduction to the National Treatment of Disease", by John Mitchell Bruce. Also available from Amazon: The pharmacology and therapeutics of the materia medica.
A resinous exudation from the stem of the Spruce Fir, Abies excelsa. Melted and strained; imported from Germany.
Characters.-Hard and brittle, yet gradually taking the form of the vessel in which it is kept; opaque, varying in colour, but generally dull reddish-brown; of a peculiar somewhat empyreumatic perfumed odour, and aromatic taste, without bitterness; free from vesicles; gives off no water when heated.
Composition.-Burgundy pitch consists of various resinous acids, as in ordinary resin, combined with oil of turpentine. A special volatile oil imparts to it its odour.
Preparation. Emplastrum Picis.-1 in 2. Pix Burgundica is also contained in Emplastrum Ferri.