Galen of course thought that a dry medicine was good for a moist disease, and that in a compound medicine, by mixing a very cold with a slightly cold drug in varying proportions a medicine of any desired degree of coldness might be obtained.[614] In general he regarded solids like stones and metals as dry and cold, while he thought that hot and moist objects tended to evaporate rapidly into air.[615] So he declared that dryness of solid bodies was incurable, while he believed that children’s bodies were more easily dissolved than adults’ because moister and warmer.[616] The Stoics and many physicians believed that heat prolonged life, but Asclepiades pointed out that the Ethiopians are old at thirty because the hot sun dries up their bodies so, while the inhabitants of Britain sometimes live to be one hundred and twenty years old. This last, however, was regarded as probably due to the fact that their thicker skins conserved their innate heat longer.[617] [Sidenote: Galen’s therapeutics obsolete.] As an offset to the evidence which will be presented later of the traces of occult virtues, magic, and astrology in Galen’s therapeutics I should like to be able to indicate the good points in it. But his entire system, like the four quality theory upon which it is largely based, seems now obsolete, and what evidenced his superiority to other physicians in his own day would probably strike the modern reader only as a token of his distinct inferiority to present practice. Eighty odd years of modern medical progress since have added further emphasis to Daremberg’s declaration that we have had to throw overboard “much of his physiology, nearly all of his pathology and general therapeutics.”[618] [Sidenote: Some of his medical notions.]