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ONE: TWO:��It��s no joking matter,�� Sandy spoke sharply. ��You listen to my idea and see what you think.��

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ONE:Before entering on the chain of reasoning which led Aristotle to postulate the existence of a personal First Cause, we must explain the difference between his scientific standpoint, and that which is now accepted by all educated minds. To him the eternity not only of Matter, but also of what he called Form,��that is to say, the collection of attributes giving definiteness to natural aggregates, more especially those known as organic species��was an axiomatic certainty. Every type, capable of self-propagation, that could exist at all, had existed, and would continue to exist for ever. For this, no explanation beyond the generative power of Nature was required. But when he had to account for the machinery by which the perpetual alternation of birth and death below, and the changeless revolutions of the celestial spheres above the moon were preserved, difficulties arose. He had reduced every other change to transport through space; and with regard to this his conceptions were entirely mistaken. He believed that moving matter tended to stop unless it was sustained by some external force; and whatever their advantages over him in other respects, we cannot say that the Atomists were in a position to correct him here: for their349 theory, that every particle of matter gravitated downward through infinite space, was quite incompatible with the latest astronomical discoveries. Aristotle triumphantly showed that the tendency of heavy bodies was not to move indefinitely downwards in parallel lines, but to move in converging lines to the centre of the earth, which he, in common with most Greek astronomers, supposed to be also the centre of the universe; and seeing light bodies move up, he credited them with an equal and opposite tendency to the circumference of the universe, which, like Parmenides and Plato, he believed to be of finite extent. Thus each kind of matter has its appropriate place, motion to which ends in rest, while motion away from it, being constrained, cannot last. Accordingly, the constant periodicity of terrestrial phenomena necessitates as constant a transformation of dry and wet, and of hot and cold bodies into one another. This is explained with perfect accuracy by the diurnal and annual revolutions of the sun. Here, however, we are introduced to a new kind of motion, which, instead of being rectilinear and finite, is circular and eternal. To account for it, Aristotle assumes a fifth element entirely different in character from the four terrestrial elements. Unlike them, it is absolutely simple, and has a correspondingly simple mode of motion, which, as our philosopher erroneously supposes, can be no other than circular rotation."What better time could we have than tonight?" TWO:��Who are you, please?�� Sandy shot the question out suddenly.(1.) How may mechanical be distinguished from civil engineering?��(2.) What test can be applied to determine the progress made in any branch of engineering?��(3.) What are some of the conditions which prevent the use of constants in machine construction?��(4.) Is mechanical engineering likely to become more exact and scientific?��(5.) Name some of the principal branches of mechanical engineering.��(6.) Which is the most extensive and important?

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ONE:Besides the encouragement which it gave to kind offices between friends and neighbours, the Stoic doctrine of humanity and mutual love was honourably exemplified in Seneca��s emphatic condemnation of the gladiatorial games and of the40 horrible abuses connected with domestic slavery in Rome.86 But we miss a clear perception that such abuses are always and everywhere the consequences of slavery; and the outspoken abolitionism of the naturalists alluded to by Aristotle does not seem to have been imitated by their successors in later ages.87 The most one can say is that the fiction of original liberty was imported into Roman jurisprudence through the agency of Stoic lawyers, and helped to familiarise men��s minds with the idea of universal emancipation before political and economical conditions permitted it to be made a reality. TWO:As I passed a Red Cross Hospital, partly spared, I noticed a Flemish doctor, who first looked at me from the door held ajar, and then came nearer; a strapping young fellow with a black beard. After I had made myself known as a Netherlander, he was clearly surprised, and it seemed as though he had a lot to ask or to tell. I expected to hear a torrent of abuse against the Huns, who had destroyed everything, and murdered so many innocent119 people, or a lament about the valuable treasures of the library, which also had not been spared; but no, other thoughts occupied his mind. With a slightly trembling voice he asked:��There��s the amphibian,�� Dick muttered. ��Stranded��cracked up, maybe. But��if we could get down and land, we could use her, two of us could, to go to the swamp and see what��s there��before anybody else gets to the life preserver the jewels must have been tied to.��

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ONE:One of the effects of employing gauges in machine fitting is to inspire confidence in workmen. Instead of a fit being regarded as a mysterious result more the work of chance than design, men accustomed to gauges come to regard precision as something both attainable and indispensable. A learner, after examining a set of well fitted cylindrical gauges, will form a new conception of what a fit is, and will afterwards have a new standard fixed in his mind. TWO:"It is a pity, sir, that you did not arrive a day sooner, then you might have witnessed great barbarity of the Germans. If you walk on a little farther along the canal, you will see three persons hanging from a tree near Haccourt; one of these is a boy of fourteen. Nobody was allowed on the road, and as a patrol met these three persons, they concluded immediately that they were francs-tireurs, strung them up on the tree, without a trial of any sort, and in addition shot each a bullet through the head. To-day another patrol arrived and had the effrontery to tell the members of the Maastricht Red Cross that the boy had murdered a captain. And we are not allowed to remove the corpses. Horrible!... horrible!"The political constitution and code of laws recommended by Plato to his new city are adapted to a great extent from the older legislation of Athens. As such they have supplied the historians of ancient jurisprudence with some valuable indications. But from a philosophic point of view the general impression produced is wearisome and even offensive. A universal system of espionage is established, and the odious trade of informer receives ample encouragement. Worst of all, it is proposed, in the true spirit of Athenian intolerance, to uphold religious orthodoxy by persecuting laws. Plato had actually come to think that disagreement with the vulgar theology was a folly and a crime. One passage may be quoted as a warning to those who would set early associations to do the work of reason; and who would overbear new truths by a method which at one time might have been used with fatal effect against their own opinions:��

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