and Irregular Motions, causes Division of the composed Parts; but in the time of dissolving, and divisions of any Part, there is a strife which causes Pain: and if the strife be in the Lungs, it causes Coughs, by obstructing the Breath: but, some Coughs proceed from Vapours and Winds, arising from the decayed Interior Parts, sending up Vapours from the Dissolving Substance, which causeth Coughs; and some Coughs cause Decays of the Prime Interior Parts: for, when there falls from the Head a constant Distillation, this Distillation is like dropping Water, which will penetrate or divide Stone; and more easily will dropping or drilling Water do it, as Rheum, will corrupt Spongy Matter as Flesh is: but, according as the Rheum is Fresh, Salt, or Sharp, the Parts are a longer or shorter time decaying: for, Salt and Sharp is Corroding; and, by the Corroding Motions, Ulcerates those Parts the Salt Rheums fall on, which destroys them soon. As for _Chin-Cough_, 'tis a Wind or Vapour arising from the Lungs, through the Wind-pipe; and as long as the Wind or Vapour ascends, the Patient cannot draw in Reviving Air or Breath, but Coughs violently and incessantly, until it faint away, or have no Strength left; and with straining, will be as if it were choaked or strangled, and become black in the face, and, after the Cough is past, recover again; but some dye of these sorts of Coughs. CHAP. IX. Of GANGREN'S. _Gangren's_ are of the Nature of the _Plague_; and they are of Two sorts, as the _Plague_ is; the one more sudden and deadly than the other: The only difference of their Insecting Qualities, is, That _Gangren's_ spread by insecting still the next, or Neighbouring Parts; whereas Plagues infect Forrein, as much as Home-Parts. Also, the deadly sort of _Gangren's_, infect (as I may say) from the Circumference towards the Center: when as the deadly sorts of Plague, infect from the Center, towards the Circumference. But, that sort of _Gangrene_ that is the weaker sort, infects only the next adjoining Parts, by degrees, and after a spreading manner, rather than after a piercing manner. But some may object, That _Plagues_ and _Gangren's_ are produced from different Causes; as for example, Extream Cold will cause _Gangren's_; and Extream Heat causes _Plagues_. I answer, That Two opposite Causes may produce like Effects, for which may be brought numerous Examples. CHAP. X. Of Cancers and Fistula's.