ammoniac, of each, dr. xij; of the flour of beans, dr. vj; add to liquid pitch, and spread upon skin, and apply. But do not take away the pledget until it fall off spontaneously. The medicine must not be prepared long beforehand, as it soon becomes dry. When the tumour is no wise dissipated by these means, and matter falls into it, it is to be opened, and the matter evacuated, taking care not to apply to it water or oil; or, if it be necessary to clean the sore, it must be done with honied water, oxycrate, wine, and wine and honey; and if it become inflamed, the cataplasm of lentils is to be applied; but if it is not inflamed, we may use some of the plasters to such openings, more especially that from chalcitis; but apply to them sponge or wool soaked in austere wine. But to the wound itself, do not apply any of the oily ointments, such as the tetrapharmacon, for it stands much in need of being dried. _Those things which open abscesses._ Since some persons will not endure to have abscesses opened with iron, we must endeavour to have recourse to epispastic medicines. Having triturated the root of narcissus in honied water, boil it with oil of iris, and apply; or, having triturated the tender root of calamus, and if it be hard, boil it in honied water, and apply; or, use a cataplasm of birthwort and honey. But equal parts of dry pitch and Cretan bee-glue, produce the rupture of abscesses and promote cicatrization. _The Dionysian plaster, a wonderful epispastic application for abscesses, to the breasts and to buboes, dissipating by the insensible pores._ Of old oil, of water, of each, lb. j; having boiled the oil and water for a little time, add of aphronitrum, oz. vj; of misy, oz. j or ij; and boil until it does not stain the finger; then add of the manna of frankincense, of wax, of turpentine, of each, oz. vj.