This class is known as medicated papers, and was introduced into the U. S. P. in 1870, having previously been official in the French Codex and British Pharmacopoeia. The processes of preparation are given under each particular paper, the modes of. coating, etc., necessarily varying according to the material employed. They (excepting potassium nitrate paper) are like plasters, differing, however, in being spread upon non-absorbent, or sized paper.
King's American Dispensatory, 1898, was written by Harvey Wickes Felter, M.D., and John Uri Lloyd, Phr. M., Ph. D.