When disease was ascribed to the operation of demons in residence in the patient’s body, a belief at one time world-wide in its distribution, the treatment mostly relied upon to cure the disease, and, granting the premises, a perfectly rational therapeutic method, was by various devices to render the patient’s body too uncomfortable for the demon. And among many other modes of securing this desirable end was the smoking of the demon out by strong odours, fumes being generated around the patient by burning horns, hair, and certain odoriferous woods and plants. Among the Chippeway Indians, we are told, a species of cypress was set on fire for this purpose, and the efficacy of the remedy was heightened by the needle-shaped leaves of the tree flying off and sticking in the spirit. Sometimes a medical man may feel disposed to smile when he sees the priest in church “censing” the Bible in order to drive away the evil one before he begins to read it. Yet fumigation has lingered on long in medicine as well as in religion. During the severe epidemics of cholera in Egypt not so many years ago, hundreds of pounds weekly were spent upon bonfires of sulphur in the streets of Cairo, a method of disinfection more likely to drive off demons than to destroy the comma bacillus in the drinking-water! In mediæval, Jacobean, and Georgian medicine, fumigation was a favourite remedy. Every one, for example, is familiar with the old-fashioned treatment of fainting by burning feathers under the nose. And perfumes and aromatics in general were widely used in the medicine of those days, as the following extract from Salmon’s “Dispensatory” (1696) shows: “_Balsamum Apoplecticum Horstii_, Apoplectick Balsam of Horstius. “_Take of the Oils of Nutmegs_ ℥i, _of white Amber rectified_ ℥ʃ, _Roses (commonly called Adeps Rosarum) of Cinnamon_ A. ℈i., _of Lavender_, _of Marjoram_ A. grs. xv. _of Benjamin_, _of Rue_ A. ℈ʃ _of Cloves_, _of Citrons_ A. grs. iv. _Mix all well together, then add Ambergrise_ ʒʃ, _Oriental Civet_ ℈iv., _Choice Musk_ ʒi. _Mix all according to Art, to the just consistence of a Balsam._ “_Salmon._ The Oil of Nutmegs is that made by expression, all the rest are Chymical. _Horstius_ saith, that in the whole Republick of Medicine, there is scarcely found an Apoplectick Balsam more illustrious for Fame, more noble for Virtue, more worthy for Honour, more ready for Help, and more fragrant for smell, than this. It chears and comforts all the spirits, natural, vital, and animal, by anointing the extremities of the Nostrils and the Pulses. It cures Convulsions, Palsies, Numbness, and other Diseases proceeding of cold.” The modern physician may think this Balsam “apoplectick” in a sense never dreamt of by its author; nevertheless he must also sigh for the faith that believed all those wonders. Here is another from the same source for “the strengthening of memory”: