_In treating of every Disease in particular, we shall shew the manner of making the particular Bandage that is convenient for it._ * * * * * {97} A TREATISE OF _Chirurgical Diseases_. * * * * * CHAP. I. _Of Tumours in general, Abcesses or Impostumes, Breakings out, Pustules, and Tubercles._ _What is a Tumour?_ A Tumour is a rising or bloated Swelling rais'd in some part of the Body by a Setling of Humours. _How is this setling of Humours produc'd?_ Two several ways, _viz._ by _Fluxion_ and _Congestion_. _What is the Setling by Fluxion?_ It is that which raiseth the Tumour all at once, or in a very little space of time, by the Fluidity of the Matter. {98} _What is the Setling by Congestion?_ It is that which produceth the Tumour by little and little, and almost insensibly, by reason of the slow Progress and thickness of the Matter. _Which are the most dangerous Tumours, those that arise from Fluxion, or those that derive their Original from Congestion?_ They that proceed from Congestion, because their thick and gross Matter always renders 'em obstinate, and difficult to be cur'd. _Whence do the differences of Tumours proceed?_ They are taken, _first_, from the Natural Humours, _Simple_, _Mixt_, and _Alter'd_: _Simple_, as the _Phlegmon_, which is made of Blood, and the _Erysipelas_ of Choler; _Mixt_, as the _Erysipelas Phlegmon_, which consists of Blood mingl'd with a Portion of Choler; or the _Phlegmonous Erysipelas_, which proceeds from Choler intermixt with a Portion of Blood: _Alter'd_, as the _Melia_ which is compos'd of many Humours, that can not be any longer distinguish'd by reason of their too great Alteration. _Secondly_, the difference of Tumours is taken from their likeness to some other thing, as the Carbuncle and the _Talpa_, the former resembling a burning Coal, and the other a Mole, according to the Etymology of their _Latin_ Names. _Thirdly_, From the Parts where they are situated; as the Ophthalmy in the Eye and the Quinsey in the Throat. _Fourthly_, from Disease that causeth 'em, as Venereal and Pestilential Buboes. _Fifthly_, from certain Qualities found in some, and not in others; as the _Encysted_ Tumours, which have their Matter clos'd within their proper _Cystes_ or Membranes, and so of many others. {99} _How many kinds of Tumours are there that comprehend at once all the particular Species?_ They are four in Number, _viz._ the Natural Tumours, the Encysted, the Critical, and the Malignant. _What are natural Tumours?_ They are those that are made of the four Humours contain'd in the Mass of the Blood, or else of many at once intermixt together. _What are the four Humours contain'd in the Mass of the Blood?_