One of the first great men to take a different view was Francis Bacon. Macaulay, in his famous essay, quotes him as saying: “Philosophy is the relief of man’s estate, and the endowment of the human race with new powers; increasing their pleasures and mitigating their sufferings.” These noble words seem to anticipate the famous definition of civil engineering, embodied by Telford in the charter of the British Institution of Civil Engineers: “Engineering is the art of controlling the great powers of nature for the use and convenience of man.” The seed sown by Bacon was long in producing fruit. Until the laws of nature were better known, there could be no practical application of them. Towards the end of the eighteenth century a great intellectual revival took place. In literature appeared Voltaire, Rousseau, Kant, Hume, and Goethe. In pure science there came Laplace, Cavendish, Lavoisier, Linnæus, Berzelius, Priestley, Count Rumford, James Watt, and Dr. Franklin. The last three were among the earliest to bring about a union of pure and applied science. Franklin immediately applied his discovery that frictional electricity and lightning were the same to the protection of buildings by lightning-rods. Count Rumford (whose experiments on the conversion of power into heat led to the discovery of the conservatism of energy) spent a long life in contriving useful inventions. James Watt, one of the few men who have united in themselves knowledge of abstract science, great inventive faculties, and rare mechanical skill, changed the steam-engine from a worthless rattletrap into the most useful machine ever invented by man. To do this he first discovered the science of thermodynamics, then invented the necessary appliances, and finally constructed them with his own hands. He was a very exceptional man. At the beginning of the nineteenth century there were few engineers who had received any scientific education. Most of them worked by their constructive instincts, like beavers, or from experience only. It took a lifetime to educate such an engineer, and few became eminent until they were old men. Now there is in the profession a great army of young men, most of them graduates of technical schools, good mathematicians, and well versed in the art of experimenting. The experiments of undergraduates on cements, concrete, the flow of water, the impact of metals, and the steam-engine, have added much to the general stock of knowledge. One of the present causes of progress is that all discoveries are published at once in technical journals and in the daily press. The publication of descriptive indexes of all scientific and engineering articles as fast as they appear is another modern contrivance. Formerly scientific discoveries were concealed by cryptograms, printed in a dead language, and hidden in the archives of learned societies. Even so late as 1821 Oersted published his discovery of the uniformity of electricity and magnetism in Latin.