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THe last kind of seperation remaines, * 1.1 which is burning, which is to be used when diseases cannot be taken away by medicines, nor cutting; burning is performed two wayes, * 1.2 either by those things which actually have in them fire, and a fiery quality as Iron, or other fiery Instruments made of Gold, Silver, Brasse, which are called actuall Cauteries, or with burning medicines, which are called potentiall Caute∣ries.
There are some differences of actuall Cauteries, especially, * 1.3 in respect of matter and figure, and differing also some other wayes; as for matter, Metallick Instruments prepared of Iron, Brasse, Silver, Gold, are in use this day, Iron burnes potently, Brasse and Gold not so violently, the figures of Cauteries are various, which are described every where, sometimes they are fiered more, sometimes lesse, sometimes impressed deeper, sometimes superficially only, the manner of burning is to be seen in the Institutions,
Another manner of burning is that which is performed by potentiall Cauteries, * 1.4 what Caustick medicines are, and Es∣caroticks, is spoken above, part the 1. sect the 1. Chap the 10 th. and in what manner Cauteries are to be prepared shall be shewne in the end of this Book.
Fontanells, * 1.5 and Issues are made by actuall and potentiall Cauteries, namely little Ulcers, prepared to evacuate, draw back, and drive humours through them, but in what parts, and how these Fontanells are to be made shall be shewn in the Institutions.
To this third operation may be referred that, * 1.6 whereby something is drawn in the body, or out of the body, by cup∣ping glasses, but a cupping glass is a vessell with a belly which is fastned to the body to draw, all whose strength of acting comes by reason of vacuity, but what the differences of them are, the manner of applying of them, and their use, shall be shewn in the Institutions: and thus much of the third Chy∣rurgicall operation.