The full exposition of the opinions of HIPPOCRATES was left for GALEN, and we prefer to make reference to him on this theory, which by his genius and talent was so much embellished, that it became the glory of science, exercising an almost undisputed authority during a long lapse of ages. Indeed the gigantic intellect of this great man, still continues to shed its vast illumination over the world of science, particularly that of medicine; which, if it owes its birth to the divine old man of Cos, is not less indebted for its nurture and growth to the celebrated native of Pergamus. GALEN is the facile princeps of physicians. His astonishing industry, perseverance, and acquirements, his ingenious arguments, and persuasive eloquence, give him an unquestionable claim to the title of princeps, so long accorded to him; and those who even in the present enlightened period, will study his works, shall find themselves almost irresistibly led away by the charm of his suasion. GALIEN est le seul des anciens qui ait donne un corps complet de medecine: Quoique forme des debris de toutes les doctrines precedentes, son systeme offre cependant, malgre les contradictions ou il tombe assez souvent, une unite remarquable dans toutes ses parties; un ensemble seduisant, qu'un genie de l'ordre le plus eleve pouvoit seul imprimer a un pareil edifice. Ramenant tout a un petit nombre de principes generaux, qui s'ils ne peuvent satisfaire la raison, fournissent du moins une reponse facile a tout, ce systeme dut etre adopte avec empressement, et sa fortune ne peut etonner.--_Biographie Medicale, Tom. IV._