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It will scarcely be expected that any part of the present work, intended mainly for apprentice engineers, should relate to designing machines, yet there is no reason why the subject should not to some extent be treated of; it is one sure to engage more or less attention from learners, and the study of designing machines, if properly directed, cannot fail to be of advantage.

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It may also be mentioned that lathes constructed with angular guides, have usually such ways for the moving heads as well as for the carriages; this gives the advantage of firmly binding the [125] two sides of the frame together in fastening the moving head, which in effect becomes a strong girt across the frame; the carriages also have an equal and independent hold on both sides of a shear. In following this matter thus far, it may be seen how many conditions may have to be considered in reasoning about so apparently simple a matter as the form of ways for lathe carriages; we might even go on to many more points that have not been mentioned; but what has been explained will serve to show that the matter is not one of opinion alone, and that without practical advantages, machine tool-makers will not follow the most expensive of these two modes of mounting lathe carriages."Vis? Do you mean to say, sir, that the whole of Vis has been set on fire?"<024>
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TWO:The position assigned to women by Plato may perhaps have seemed to his contemporaries the most paradoxical of all his projects, and it has been observed that here he is in advance even of our own age. But a true conclusion may be deduced from false premises; and Platos conclusion is not even identical with that reached on other grounds by the modern advocates of womens rights, or rather of their equitable claims. The author of the Republic detested democracy; and the enfranchisement of women is now demanded as a part of257 the general democratic programme. It is an axiom, at least with liberals, that no class will have its interests properly attended to which is left without a voice in the election of parliamentary representatives; and the interests of the sexes are not more obviously identical than those of producers and consumers, or of capitalists and labourers. Another democratic principle is that individuals are, as a rule, the best judges of what occupation they are fit for; and as a consequence of this it is further demanded that women should be admitted to every employment on equal terms with men; leaving competition to decide in each instance whether they are suited for it or not. Their continued exclusion from the military profession would be an exception more apparent than real; because, like the majority of the male sex, they are physically disqualified for it. Now, the profession of arms is the very one for which Plato proposes to destine the daughters of his aristocratic caste, without the least intention of consulting their wishes on the subject. He is perfectly aware that his own principle of differentiation will be quoted against him, but he turns the difficulty in a very dexterous manner. He contends that the difference of the sexes, so far as strength and intelligence are concerned, is one not of kind but of degree; for women are not distinguished from men by the possession of any special aptitude, none of them being able to do anything that some men cannot do better. Granting the truth of this rather unflattering assumption, the inference drawn from it will still remain economically unsound. The division of labour requires that each task should be performed, not by those who are absolutely, but by those who are relatively, best fitted for it. In many cases we must be content with work falling short of the highest attainable standard, that the time and abilities of the best workmen may be exclusively devoted to functions for which they alone are competent. Even if women could be trained to fight, it does not follow that their energies might not be more advantageously258 expended in another direction. Here, again, Plato improperly reasons from low to high forms of association. He appeals to the doubtful example of nomadic tribes, whose women took part in the defence of the camps, and to the fighting power possessed by the females of predatory animals. In truth, the elimination of home life left his women without any employment peculiar to themselves; and so, not to leave them completely idle, they were drafted into the army, more with the hope of imposing on the enemy by an increase of its apparent strength than for the sake of any real service which they were expected to perform.151 When Plato proposes that women of proved ability should be admitted to the highest political offices, he is far more in sympathy with modern reformers; and his freedom from prejudice is all the more remarkable when we consider that no Greek lady (except, perhaps, Artemisia) is known to have ever displayed a talent for government, although feminine interference in politics was common enough at Sparta; and that personally his feeling towards women was unsympathetic if not contemptuous.152 Still we must not exaggerate the importance of his concession. The Platonic polity was, after all, a family rather than a true State; and that women should be allowed a share in the regulation of marriage and in the nurture of children, was only giving them back with one hand what had been taken away with the other. Already, among ourselves, women have a voice in educational matters; and were marriage brought under State control, few would doubt the propriety of making them eligible to the new Boards which would be charged with its supervision. THREE:Looktoward shore! screamed Sandy.That happened each time that he started again, and I was more tired by trying to convince this man than if I had walked all the rest of the way to Brussels. But after all I got there.
TWO: THREE:Still more important was the antithesis between Nature and convention, which, so far as we know, originated exclusively with Hippias. We have already observed that universality and necessity were, with the Greeks, standing marks of naturalness. The customs of different countries were, on the other hand, distinguished by extreme variety, amounting sometimes to diametrical opposition. Herodotus was fond of calling attention to such contrasts; only, he drew from them the conclusion that law, to be so arbitrary, must needs possess supreme and sacred authority. According to the more plausible interpretation of Hippias, the variety, and at least in Greek democracies, the changeability of law proved that it was neither sacred nor binding. He also looked on artificial social institutions as the sole cause of division and discord among mankind. Here we already see the dawn of a cosmopolitanism afterwards preached by Cynic and82 Stoic philosophers. Furthermore, to discover the natural rule of right, he compared the laws of different nations, and selected those which were held by all in common as the basis of an ethical system.63 Now, this is precisely what was done by the Roman jurists long afterwards under the inspiration of Stoical teaching. We have it on the high authority of Sir Henry Maine that they identified the Jus Gentium, that is, the laws supposed to be observed by all nations alike, with the Jus Naturale, that is, the code by which men were governed in their primitive condition of innocence. It was by a gradual application of this ideal standard that the numerous inequalities between different classes of persons, enforced by ancient Roman law, were removed, and that contract was substituted for status. Above all, the abolition of slavery was, if not directly caused, at any rate powerfully aided, by the belief that it was against Nature. At the beginning of the fourteenth century we find Louis Hutin, King of France, assigning as a reason for the enfranchisement of his serfs, that, according to natural law, everybody ought to be born free, and although Sir H. Maine holds this to have been a mistaken interpretation of the juridical axiom omnes homines natura aequales sunt, which means not an ideal to be attained, but a primitive condition from which we have departed: nevertheless it very faithfully reproduces the theory of those Greek philosophers from whom the idea of a natural law was derived. That, in Aristotles time at least, a party existed who were opposed to slavery on theoretical grounds of right is perfectly evident from the language of the Politics. Some persons, says Aristotle, think that slave-holding is against nature, for that one man is a slave and another free by law, while by nature there is no difference between them, for which reason it is unjust as being the result of force.64 And he proceeds to prove the contrary at length. The same doctrine of natural equality led to important political consequences, having, again according to Sir83 H. Maine, contributed both to the American Declaration of Independence and to the French Revolution.Rapping plates, draw-irons, and other details of pattern-making are soon understood by observation. Perhaps the most useful suggestion which can be given in reference to draw-irons is to say they should be set on the under or bottom side of patterns, instead of on the top, where they are generally placed. A draw-plate set in this way, with a hole bored through the pattern so as to insert draw-irons from the top, cannot pull off, which it is apt to do if set on the top side. Every pattern no matter how small, should be ironed, unless it is some trifling piece, with dowel-pins, draw and rapping plates. If a system of draw-irons is not rigidly carried out, moulders will not trouble themselves to take care of patterns.
TWO:"You have really been of great service to me, madame," he said. "It was very good of you to come and tell me straightforwardly. Now, let us see if we can trace these notes to the possession of the previous holder." THREE:An engineer may direct and control work without a knowledge of practical fitting, but such control is merely a commercial one, and cannot of course extend to mechanical details which are generally the vital part; the obedience that may thus be enforced in controlling others is not to be confounded with the respect which a superior knowledge of work commands.In regard to the use of the T square and set squares, no useful rules can be given except to observe others, and experiment until convenient customs are attained. A beginner should be careful of adopting unusual plans, and above all things, of making important discoveries as to new plans of using instruments, assuming that common practice is all wrong, and that it is left for him to develop the true and proper way of drawing. This is a kind of discovery which is very apt to intrude itself at the beginning of an apprentice's course in many matters besides drawing, and often leads him to do and say many things which he will afterwards wish to recall.
TWO: THREE:We have already repeatedly alluded to the only man of genius whom Epicureanism ever counted among its disciples. It is time that we should determine with more precision the actual relation in which he stood to the master whom, with a touching survival of religious sentiment, he revered as a saviour and a god.
Top Considering material progress as consisting primarily in the demonstration of scientific truths, and secondly, in their application to useful purposes, we can see the position of the engineer as an agent in this great work of reconstruction now going on around us. The position is a proud one, but not to be attained except at the expense of great effort, and a denial of everything that may interfere with the acquirement of knowledge during apprenticeship and the study which must follow.Leona pointed to the window, against which Charlton's face had been pressed a moment before. The dimness of it, the stern accusing eyes made up a picture so grim, so ghostly, that the woman's heart turned to water within her. The fear of yesterday took the strength out of her limbs."Lige,CHAPTER III32
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