The surprising progress in anatomy and physiology made during the first portion of the Anatomic Period and during{043} the better days of the Alexandrian institute did not keep men from confounding several different points in the Hippocratic doctrine, by which confidence in the same was naturally shaken. Thus many new speculations were hazarded which nullified each other. In the midst of this confusion practitioners continued to seek in experience a refuge from the incessant variations of dogmatism and the sterile incertitude of the skeptics. Thus, empiricism as a school of practice became placed upon a firmer and firmer foundation, and the empirics of that day seem to have laid the true basis of our art. Their doctrine took at first a rapid growth, and Galen spoke of it with great regard. The circumstances under which it was proclaimed were most favorable for its propagation. Theories had fallen into confusion; practice, methods, and opinions were questionable. Everything was conjecture, and that which rested on the evidence of facts was by the empirics received with enthusiasm. Although founded on pure observation, it did not put an end to differences of opinion, and in the eyes of the ancients it lacked in solidity, because it did not attach itself to any philosophic theory then known. This doctrine was then best able to captivate physicians on account of its simplicity, contrasted with the general inability to satisfy speculative minds; but for this very reason it subsequently fell into disgrace, and the term "empiricism" became synonymous with ignorance. For centuries condemned and despised, it was revived from its long humiliation under the name of the Experimental Method, and achieved, after the labors of Bacon, Locke, and Condillac, almost universal dominion in the sciences.