"True that no new principle was illustrated by any of these discoveries, as Whewell said; but medieval science had done something more than the actual discovery of new principles. It had prepared the discovery of all the new principles which we know at the present time in mechanical sciences; it had accustomed the explorer to observe facts and to reason from them. It had inductive science, even though it had not yet fully grasped the importance and the powers of induction; and it had laid the foundations of both mechanical and natural philosophy. Francis Bacon, Galileo, and Copernicus were the direct descendants of a Roger Bacon and a Michael Scot, as the steam engine was a direct product of the researches carried on in the Italian universities on the weight of the atmosphere, and of the mathematical and technical learning which characterized Nuremberg." "But why should one take trouble to insist upon the advance of science and art in the medieval city? Is it not enough to point to the cathedrals in the domain of skill, and to the Italian language and the poem of Dante in the domain of thought, to give at once the measure of what the medieval city created during the four centuries it lived?" We are prone to think of evolution in human affairs as being the ruling principle. As a consequence of this, {333} we are apt to consider that since intervening periods between the nineteenth century and the Middle Ages were lacking in education, in applied science, and in interest in physical science to a great degree, beyond doubt, then, the Middle Ages must have been still more lacking in these desirable qualities of education and human knowledge. This is the sort of deduction that greets one constantly in so-called histories of education, and especially in such supposed contributions to the history of the relationship of science to religion or theology as have been made here in America. This deduction, as I have said before, is made by men who are the first to asperse the medieval scholars for having used deduction too freely, and who are ever ready to praise induction. The induction in this matter--that is, the story of the actual history of science in the Middle Ages--is the direct contradiction of the deduction from false principles. Intervening centuries not only failed to progress beyond the Middle Ages, but some of them were far behind the achievements of that unfortunately despised period. Once more Prince Kropotkin has touched this matter very suggestively. After describing the achievements of applied science in the Middle Ages, he says: