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ONE:On passing to terrestrial physics, we find that Aristotle is, as usual, the dupe of superficial appearances, against which other thinkers were on their guard. Seeing that fire always moved up, he assumed that it did so by virtue of a natural tendency towards the circumference of the universe, as opposed to earth, which always moved towards the centre. The atomists erroneously held that all matter gravitated downwards through infinite space, but correctly explained the ascent of heated particles by the pressure of surrounding matter, in accordance, most probably, with the analogy of floating bodies.200 Chemistry as a science is, of course, an entirely modern creation, but the first approach to it was made by Democritus, while no ancient philosopher stood farther from its essential principles than Aristotle. He analyses bodies, not into their material elements, but into the sensuous qualities, hot and cold, wet and dry, between which he supposes the underlying substance to be perpetually oscillating; a theory which, if it were true, would make any fixed laws of nature impossible.If the synthesis of affirmation and negation cannot profitably be used to explain the origin of things in themselves, it has a real and very important function when limited to the subjective sphere, to the philosophy of practice and of belief. It was so employed by Socrates, and, on a much greater scale, by Plato himself. To consider every proposition from opposite points of view, and to challenge the claim of every existing custom on our respect, was a proceeding first instituted by the master, and carried out by the disciple in a manner which has made his investigations a model for every future enquirer. Something of their spirit was inherited by Aristotle; but, except in his logical treatises, it was overborne by the demands of a pre-eminently dogmatic and systematising genius. In criticising the theories of his predecessors, he has abundantly illustrated the power of dialectic, and he has enumerated its resources with conscientious completeness; but he has not verified his own conclusions by subjecting them to this formidable testing apparatus. TWO:247THREE:And if that had been all! But dozens of boys and young men had been taken to Bilsen as prisoners. There had been a real hunt for all able-bodied lads who might be of any use in the Belgian army. Women and old men were compelled by threats to betray the hiding-places of their sons or husbands, and if one of them was found hidden away under straw or in barns, he was ill-treated or beaten with rifle-butts. Some fled to Maastricht, others to the Campine, the northern part of Belgium. I presume that both groups have at length arrived in Antwerp.