The seventeenth century, in contrast to the idealistic sixteenth, witnessed the advent of modern realism in almost all departments of thought. Medicine furnished the first example in what we are accustomed to-day to speak of as the exact method; hence, the century is of great importance, in that physicists and chemists began to be original, instead of mere followers of the past. The most notable feature of medicine was the promulgation of three medical systems: the pietistically colored Paracelsism of Van Hel-mont; the chemical system of Sylvius; and the iatro-cliemical system of the physicist and mechanician, Borelli. This period is, moreover, illumined by the life of one great practitioner, whose name will be imperishable in the history of our art,--namely, Sydenham. The principal tendency of the time was toward skepticism, which had begun in the preceding century with Montaigne, and was continued by Charron, under the patronage of Queen Marguerite of Navarre; it was the fundamental idea of Pierre Bayle, the author of the great dictionary. Opposed thereto was the supernatural philosophy, or the theosophic, cabalistic, or mystic. The leading exponent of the latter was Boehme, who was a business colleague of the celebrated "Meistersinger," Hans Sachs, in Germany, and of Blaise Pascal and his contemporary. Malebranche,{153} in France. The doctrine of Lord Bacon, Lord Verulam (1561-1626), a man who showed himself as exalted in mind as he was mean in personal traits, was of great importance Bacon is a landmark in history as the defender and eulogist of modern realism,--i.e., of inductive philosophy. While personally contributing but little to the advance of science, he taught a great method; as Gruen says, he was the philosopher of patents and profit; he recognized the compass, the art of printing, and gunpowder as great inventions, but placed little value on the discovery of Copernicus, having little comprehension of mathematics. Hobbes and Locke went farther into realistic philosophy, and the latter was an exponent later of pure empiricism.