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 by incorporating the extract (alcoholic extract, U. S.) with melted resin plaster. It is used, spread upon coarse linen or leather, in rheumatic pains, neuralgia, dysmenorrhoea, etc. I have known the system to be affected by it; and a case is on record in which even alarming symptoms resulted from the application of this plaster to a surface covered with an eruption, and partially ulcerated.