The following plasters195 are good for the stomach, the liver, and the warm dry members: rose, mastych, sanders, and wax for the stomach; hepatica, mastych, lignum aloes, and calcined ivory196 for the liver. These are the juices197 that are good for them: juice of houseleek, liverwort, sorrel, coltsfoot, lettuce, endive, plantago, and flour of barley meal; or put the substance of these in a linen cloth, and apply them to the part in which is heat, and it should be frequently198 changed; and if you do not this (frequent changing), it will do harm.