The names of the inventors of many of the compounds were duly attached to the formulas, some of which were very elaborate and complicated. Rufus of Ephesus, physician to the Emperor Trajan, the Arabian doctors, Nicolas, Rivierus, Fracastor, Fallopius, and many others are thus quoted. There were 211 preparations with more than ten ingredients in each, and one, the Antidotus Magnus Matthioli, called for 130 substances in its composition, among the 130 being Mithridatium and Theriaca which would have contributed another hundred between them. Medicated waters which had been invented by Arnold de Villa Nova in the 13th century still commanded respect, over 200 different kinds being provided. Worms, swallows, frogs' spawn, and other animal remedies as well as the whole range of the vegetable kingdom were requisitioned to surrender their virtues to these waters by distillation. Syrups, honeys, oxymels, and lohochs were numerous and included syrups of white and red poppies, rhubarb, violets, marshmallow, coltsfoot, liquorice, oxymel of squills, and mel Egyptiaca. Powders of hot precious stones and of cold precious stones, powders of pearls and spices, and a compound senna powder; troches of various drugs; basilicon ointment and a multitude of plasters are formulated. Neapolitan ointment was our blue ointment, the mercury being killed by fasting spittle. An itch ointment was made with corrosive sublimate. May butter was a favourite ingredient in ointments. It was butter made in May, melted in the sun, strained and kept the year through. Oils was a term of wide significance. Not only were expressed and distilled oils included in the reference, but oils in which things had been infused, as oil of ants, of bricks, of earthworms, of wolves, and oil of vitriol was also in