Note 2 — ERRATUM. p. 78, note 1, l. 19; for “were in orders, for the most part in holy orders;” read “were generally speaking in holy orders;”

The “humoral doctrine” is imperfectly known. The four elements are earth, water, air, fire; the four qualities are hot, cold, moist, dry; the four humours are blood, phlegm, yellow bile, black bile. By permutation of these were obtained the endless elaborations of the galenist doctrine which for many centuries blinded Europe not to the truth only, but also to the clinical and physiological methods, example, and attainments of Galen himself.