Chap. 5. Of a Quartan Ague.
AQuartan Ague is that which hath its Fits returning every fourth day, and it is caused by Me∣lancholly putrefying in the first Region of the Body.
Now Melancholly is of two sorts; Natural, and Preternatural. The Natural is bred of the thic∣ker and more earthy part of our Nourishment, being cold and dry. The Preternatural, is caused by adustion of Choller, and is therefore hot and dry. Hence arise two sorts of Quartan Agues; for that which is bred of Natural Melancholly, is called a legitimate Quartan; that which is bred of Preterna∣tural Melancholly, is called a bastar Quartan. Howbeit, the bastard Quartan may also come of Na∣tural Melancholly, being mingled with some portion of Choller.
Again, A Quartan Ague is either Single, Double, or Triple. A Single Quartan is when one Fit alone comes every fourth day. A Double is when two Fits happen upon two daies one immediately after the other, and the third day is free. A Triple Quartan is when the Fits come every day, as they do in a Quotidian, and in a Double Tertian. Now these Double and Triple Quartans come of Me∣lancholly putrefying in divers parts of the Body.
The Signs to know this Ague by, are first, such things as argue that Melancholly abounds in the Patient. Unto which must be added the coming of the Fit upon the fourth day, which is the pecu∣liar sign. Also the form of the fit differing from the fits of other Agues, doth discover this Disease. For it begins with yawning and stretchings, together with heaviness of the whol Body; after which follows cold, and then shivering and shaking, in which the Patients seem to have their bones broken. Also the heat is kindled by little and little in a cold and thick Matter. The Pulse is seldomer and slower than in other Feavers. The Urines are at first white, thin, and watry; but in the progress they are more colored, and thicker. Now these signs appear in a legitimate Quartan. But in a ba∣stard Quartan, the vehemence of the Symptomes being greater, doth argue the Humor to be thinner and hotter. But a bastard Quartan is not distinguished from a legitimate, herein alone, in that in a bastard Quartan, the heat, thirst, watchings, and other Symptoms, are more vehement; but in that the legitimate begins of it self, without any Feaver foregoing; but a bastard Quartan succeeds other Feavers and Agues, by reason of the adustion of the Humor which caused those Diseases, by means of which adustion, it degenerates into Preternatural Melancholly.
A Double Quartan is easily known by the Course of the fits. And a Triple Quartan is distingui∣shed from a Double Tertian, and a Quotidian, not only by the Signs of Melancholly abounding, and by the form of the Fits; but also because it was first a Single, or a Double Quartan before it came to be a Triple Quartan. For very rarely, or never doth a Quartan Ague begin with a Triple; but a Simple or Double Quartan degenerates into a Triple.