Avicenna describes the tertian intermittent by the name of febris tertiana periodica, and the continual tertian by that of tertiana continua; the quotidian intermittent by the name of febris phlegmatica periodica, and the continual quotidian by that of febris phlegmatica inseparabilis, or latica; the quartan intermittent by the name of quartana periodica, and the continual quartan by that of quartana continua. The synochus he calls by the name of febris sanguinis; and, in treating of it, remarks that Galen is guilty of inconsistency in stating the proximate cause of it; for that in one place he says it arises from the blood, and in another from bile. Averrhoes states the same objections to Galen’s account of the origin of synochous fevers. Avenzoar marks the distinction between the intermittent and the continual quotidians, tertians, and quartans. We have been more than usually minute in explaining the opinions of the ancients with regard to the Continual fevers, because much confusion has arisen in modern nosological treatises and works on medicine, from the distinction between them and the synochi not being properly understood. After what has been said, the medical reader will readily perceive that the Continual fevers (συνεχεῖς) of the Greeks are the same as the Remittent fevers described by Pringle, Monro, and other English authors of that age who have treated of fevers. SECT. XXVIII.—THE DIAGNOSIS AND CURE OF SYNOCHOUS FEVERS. Synochous fevers are produced sometimes by effervescence of the blood alone, and sometimes by putrefaction of the same, arising from obstruction, and have, therefore, but one paroxysm from beginning to end. The symptoms are, pulse very great, strong, quick, dense, equable; but they are not pungent; and the urine is little different from the natural. The cure of them consists in bloodletting _ad deliquium_. And those who are affected with these fevers, and are not bled, run the most imminent danger. But if anything should prevent us from having recourse to phlebotomy, we must use such other remedies as are calculated to remove obstructions, those which evacuate, and such as will allay the effervescence of the blood. But when in these cases you remark symptoms of concoction of the humours, and there is neither inflammation, œdematous swelling, nor scirrhus in any important part, nor any part cold, so as that the evil may be determined to it, you may boldly give cold water, more especially if the patient has been accustomed to cold drink. * * * * *