Page:History of England (Macaulay) Vol 1.djvu/378

 still in abject bondage, and afforded an inexhaustible subject of just ridicule to Moliere, had in England become an experimental and progressive science, and every day made some new advance in defiance of Hippocrates and Galen. The attention of speculative men had been, for the first time, directed to the important subject of sanitary police. The great plague of 1665 induced them to consider with care the defective architecture, draining, and ventilation of the capital. The great fire of 1666 afforded an opportunity for effecting extensive improvements. The whole matter was diligently examined by the Royal Society; and to the suggestions of that body must be partly attributed the changes which, though far short of what the public welfare required, yet made a wide difference between the new and the old London, and probably put a final close to the ravages of pestilence in our country. At the same time one of the founders of the Society, Sir William Petty, created the science of political arithmetic, the humble but indispensable handmaid of political philosophy. No kingdom of nature was left unexplored. To that period belong the chemical discoveries of Boyle, and the earliest botanical researches of Sloane. It was then that Ray made a new classification of birds and fishes, and that the attention of Woodward was first drawn towards fossils and shells. One after another phantoms which had haunted the world through ages of darkness fled before the light. Astrology and alchymy became jests. Soon there was scarcely a county in which some of the Quorum did not smile contemptuously when an old woman was brought before them for riding on broomsticks or giving cattle the murrain. But it was in those noblest and most arduous departments of knowledge in which induction and mathematical demonstration cooperate for the discovery of truth, that the English genius won in that age the most memorable triumphs. John Wallis placed the whole system of statics on a new foundation. Edmund Halley investigated the properties of the atmosphere, the ebb and flow of the sea, the laws of magnetism, and the course of the comets; nor did he shrink from toil, peril and exile in the cause of science. While he, on the