or all together; or mustard, with the refuse of expressed myrobalan, and vinegar and oil; or with snails burnt and triturated with honey or the roots of dock, or the detergent ointments prepared from them, as described under the head of Elephantiasis; or with some of the applications for scabies. If the parts become ulcerated, use the plaster called parygron, or that prepared from pompholyx; or melt oz. j of wax in a cyathus of oil of privet, and sprinkle upon it of sulphur vivum oz. j. _Another_ application for prurigo: Of large nuts in a rancid state, oz. j; of sulphur, oz. j; triturate with the juice of parsley, and use in the bath with much friction. This alone has proved sufficient for the cure of many cases of scabies and prurigo; and green parsley by itself, when pounded and rubbed in while the patient is in the bath, has been of great service: and in like manner, pellitory of the wall and maple rosin dissolved with rose oil, and rubbed in.—_Another_: Bruise three ounces of pure and very white rice, and, having strained, triturate with strong vinegar until it become of the thickness of the sordes of the oil in baths; and adding separately of sulphur vivum pulverized, oz. j; and mixing properly, use in the bath with much friction. When there is a greater redundance of humours, it will be better to mix the ingredients in equal proportions. * * * * * COMMENTARY. See Hippocrates (Aphor. iii, 31); Galen (Comment. et alibi); Oribasius (Morb. Curat. iii, 22); Aëtius (xiv, 20); Actuarius (Meth. Med. ii, 11); Nonnus (237); Alexander Aphrodisiensis (Probl. i, 24); Myrepsus (pluries); Pliny (xxviii, 5); Octavius Horatianus (i, 31); Marcellus (de Med. 4); Isidorus (Orig. iv, 8); Serapion (v, 6); Avicenna (iv, 7, 3, 6); Haly Abbas (Theor. viii, 17, and Pract. iv, 6); Alsaharavius (Pract. xxxi, 5); Rhases (Divis. 121); Avenzoar (ii, 7, 2.) The prurigo of Dr. Willan is here distinctly described, and a suitable method of treatment recommended. Hippocrates remarks that prurigo is common in old age. The reason which Galen assigns for this is, that the superfluities of the system are then not properly discharged by the skin. He says in another place, that pruritus may either be produced by external substances, such as nettles, squills, &c., or it may arise from indigestion and the neglect of cleanliness. Oribasius gives an account of the disease not very different from our author’s. Among other applications, he recommends one consisting of opium mixed with liquid cerate. Aëtius speaks highly of the sulphureous bath for the cure of this disease. Actuarius characterizes the disease very well, when he says that it is allied to lichen, and that when rubbed either nothing runs from the place, or some slight humidity of various colour and consistence. He assigns, as a reason for its frequency in old age, that the pores of the skin then get constricted.