Note 648 — BOOK I.—OF THE EPIDEMICS.
Francis Adams translation
The reader will find it interesting here to mark the alliance between the causus and phrenitis, to which we formerly adverted. Galen remarks that both arise from the same humour, that is to say, bile, which when it collects in the veins of the lower part of the body gives rise to causus; but from the beginning of autumn to the equinox, produces phrenitis by being determined to the brain.