Note 657 — BOOK I.—OF THE EPIDEMICS.

Galen, in his Commentary, states that he had often seen persons in consumption attacked with tertian and quotidian intermittents, but admits that he had no more experience of quintans than he had of septans and nonans. Avicenna. however, is not so sceptical as to the occurrence of these rare forms of intermittents. Indeed he says, he had often met with quintans, and that a trustworthy physician of great experience had assured him that he had met with nonans. (iii., 1, 3, 67.) Rhazes also would appear to acknowledge the occurrence of all these varieties of intermittent fever. (Contin., xxx., 10, 1, 409.)