CHAP. I. Of the causes of the Small Pockes and Meazles.
FOR that the small Pocks and Meazles are diseases, which usually are forerunners and foretellers of the plague, not only by the cor∣ruption of humours, but oft times by default of the aire; moreo∣ver, for that wormes are oft times generated in the plague, I have thought good to write of these things, to the end that by this trea∣tise the young Surgeon may bee more amply and perfectly in∣structed in that pestilent disease. Also I have thought good to treat of the Leprosie as being the off-spring of the highest corruption of humours in the body. Now the small pocks are pustles, and the meazels spots which arise in the top of the skinne by reason of the impurity of the corrupt blood sent thither by * 1.1 the force of nature. Most of the Antients have delivered that this impurity is the reliques of the menstruous blood remaining in the body of the infant, being of that matter from whence it drew nourishment in the wombe, which lying still or quiet for some space of time, but stirred up at the first opportunity of a hotter summer, or a foutherly or rainy season, or a hidden malignity in the aire, and boyling up, or working with the whole masse of the blood, spread or shew themselves upon the whole surface of the body. An argument hereof is, there are few or none who have not beene troubled with this disease, at least once in their lives, which when it be∣gins to shew it selfe, not content to set upon some one, it commonly seazeth upon more: now commonly there is as much difference betweene the small pockes and meazles, as there is between a Carbuncle and a pestilent Bubo. For the small pocks arise of a more grosse and viscous matter, to wit, of a phlegmaticke humour. But the meazles of a more subtle and hot, that is, a cholericke matter, therefore this yeilds no markes thereof, but certaine small spots without any tumour, and these either red, purple, or blacke. But the small pockes are extuberating pustles, white in the midst, but red in the circumference, an argument of blood mixed with chol∣ler,