Reviewing now the Greek period, let it be remembered that in the time of Galen animals were dissected, and that he made anatomical demonstrations on monkeys; that sometimes the corpses of the enemy were rudely dissected upon the field of battle, but that finally the practice of dissection fell into disuse, and human anatomy was studied only from books, the early Christians having evinced even more horror of the dead body for the purposes of anatomical study than did their pagan predecessors, while the Fathers of primitive times launched their anathemas against the dissection of human remains. Here, again, as usual, the interference of the church worked only general harm. This abandonment of anatomy contributed doubtless to the decadence of medicine; by the rapid extension of Christianity the pagan schools were disorganized and broken up, the profane sciences (such as medicine) were discarded, and the teachers still remaining in the old schools were ruined. Passion for religious controversy was engendered and took the place of study or original research, even to such an extent as to hasten the fall of the Empire of the East. In addition to these factors, reverence for authority of the past--that terribly oppressive weight which has kept down so much which would otherwise{056} have risen early, and which has been the greatest enemy of human learning--permitted the explanation of natural phenomena to be sought only in the writings of revered ancients, and not in living beings. No one dared to advocate changes in regard to received doctrines, and there could be no such thing as progress. Only two men in the lapse of four centuries showed any originality; these were Alexander of Tralles and Paul of Ægina, whose lives have already been briefly rehearsed. It is with some relief, however, that we can think that this period, so unfruitful in scientific progress, was not so in social amelioration. By the organization of the institutions above alluded to charlatanism was checked, by the requirement of capability and good character society was benefited, and the charitable institutes of this epoch perhaps gave the world its best models in teaching and an insight into the most valuable means of medical instruction. Of the old Greek Period, then, we may say that it accrues rather to the benefit of humanity than to that of science. CHAPTER III. _Age of Transition (continued).--Arabic Period: A.D. 640-1400. Alkindus, 873. Mesue, 777-857. Rhazes, 850-932. Haly-Abas, 994. Avicenna, 980-1037. Albucassis, 1122. Avenzoar, 1113-1161. Averroës, 11661198. Maimonides, 1135-1204. School of Salernum: Constantinus Afri-canus, 1018-1085. Roger of Salerno, 1210. Roland of Parma, 1250. The Four Masters, 1270 (?). John of Procida._