CHAP. I. Of SICKNESS. To go on as orderly as I can, I will treat of the Fundamental Diseases, and first of _Sickness_, by reason it is the most particular Disease: for though, as I have said, no part of a Human Creature is subject to that Disease, (namely, _Sickness_) but the Stomack; yet, there are different sorts of Sicknesses of the Stomack; as for example, Some sorts of Sickness is like the flowing and ebbing of the Sea: for, the Humours of the Stomack agitate in that manner, as, if the flowing motions flow upwards, it occasions Vomiting; if downwards, Purging: if the Humours divide, as, partly to flow upwards, and partly downwards, it occasions both Vomiting and Purging. But the Question is, _Whether it is the motion of the Humours, that occasions the Stomack to be sick; or the sickness of the Stomack, that occasions the Humours to flow?_ I answer: That 'tis probable, that sometimes the flowing of the Humours causes the Stomack to be sick; and sometimes the sickness of the Stomack occasions the Humours to flow; and sometimes the Stomack will be sick without the flowing of Humours, as when the Stomack is empty; and sometimes the Humours will flow, without any disturbance to the Stomack; and sometimes both the Humours and the Stomack do jointly agree in Irregularities: but, as I said, there are several sorts of sicknesses of the Stomack, or at least, that sickness doth produce several sorts of Effects; as, for example, some sorts of sickness will occasion faint and cold Sweats; which sick Motion is not flowing up or down of the Humours; but it is a cold dilatation, or rarifying, after a breathing manner; also expelling of those rarified parts through the pores: Other sorts of Motions of the Humours, are like Boyling motions, viz. Bubling motions; which occasion steaming or watry vapours, to ascend to the Head; which vapours are apt to cloud the perception of Sight. Other sorts of sick Motions, are Circular, and those cause a swimming, or a dizzie motion in the Head, and sometimes a staggering motion in the Leggs. Other sorts of sick Motions are occasioned through tough and clammy Humours, the motion of which Humours, is a winding or turning in such a manner, that it removes not from its Center; and until such time as that Turning or Winding Motions alter, or the Humour is cast out of the Stomack, the Patient finds little or no ease. CHAP. II. Of PAIN.