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 made by melting lead plaster and resin together. The British Pharmacopoeia adds a little soap, which renders the plaster more pliable, and less apt to crack in cold weather. It is the common adhesive plaster of the shops, much used for keeping the surfaces of wounds together, and as a dressing for ulcers by gently compressing them, and gradually approximating their edges. It is usually kept in the shops, already spread, by means of a machine, upon muslin cloths. As it becomes less adhesive by exposure, the fresher it is when used, the better.