sophical idea is the substance of all history. The historic mind had always glowed beneath the metaphysical ice cap. Goethe described it as one of his last steps in mental progress to have the unseen past always present; and he had approved the fine piece of idealism, since copied by Renan, in which Humboldt denounced the prosaic improvements which would make Rome a place unfitted for the spectres who are its worthiest inhabitants. Gerlach, the leader of the Prussian conservatives, used to say that what he had admired most in England was Mr. Speaker's wig. For when he spoke of it as a time-honoured relic, an historical-minded Englishman told him that it was nothing of the sort, but quite a modern institution, not two centuries old. At Göttingen one day a Protestant was defending the celibacy of the clergy, and saying that without it Catholicism would lose its identity. A Catholic replied: "We were used to married priests so long that it is the law of celibacy which we feel as an innovation."
The scientific era had its own lesson for historians. The world proceeded on its new path with increasing velocity, there was no stopping, and no step backward; and the law of progress, which had been a crude and vague speculation, became a manifest reality. With this new aspect of the life of men and of societies, a conception of history arose of which Du Bois Reymond is the prophet. The future depends on truths and forces being, and to be, discovered. The past survives only by supplying available material that may be a guide for science and an equivalent of power. The function of history is to reveal its own futility, to display the conquest of the ancient realm of uncertainty, probability, inheritance, by irresistible demonstration. Bourbons and Habsburgs go over to the Egyptian kings, and make room on earth for the monuments of a dynasty that begins with Copernicus and will never pass away. All else is ballast to be discharged, and the Greek exercise must surrender to conic sections. As mere denial of history, the new conception is an old one. But by promoting the neglected history of scientific
