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It might have been expected that, on reaching physiology, the Stagirite would stand on firmer ground than any of his contemporaries. Such, however, is not the case. As already observed, his achievements belong entirely to the dominion of anatomy and descriptive zoology. The whole internal economy of the animal body is, according to him, designed for the purpose of creating and moderating the vital heat;315 and in apportioning their functions to the different organs he is entirely dominated by this fundamental error. It was a common notion among the Greeks, suggested by sufficiently obvious considerations, that the brain is the seat of the psychic activities. These, however, Aristotle transports to the heart, which, in his system, not only propels the blood through the body, but is also the source of heat, the common centre where the different special sensations meet to be compared, and the organ of imagination and of passion. The sole function of the brain is to cool down the blooda purpose which the lungs also subserve. Some persons believe that air is a kind of food, and is inhaled in order to feed the internal fire; but their theory would involve the absurd consequence that all animals breathe, for all have some heat. Anaxagoras and Diogenes did, indeed, make that assertion, and the latter even went so far as to say that fish breathe with their gills, absorbing the air held in solution by the water passed through thema misapprehension, says Aristotle, which arose from not having studied the final cause of respiration.201 His physiological theory of generation is equally unfortunate. In accordance with his metaphysical system, hereafter to be explained, he distinguishes two elements in the reproductive process, of which one, that contributed by the male, is exclusively formative; and the other, that contributed by the female, exclusively material. The prevalent opinion was evidently, what we know now to be true, that each parent has both a formative and a material share in the composition of the embryo. Again, Aristotle, strangely enough, regards the generative element in both sexes as an unappropriated portion of the animals nutriment, the last and most refined product of digestion, and therefore not a portion of the parental system at all; while other biologists, anticipating Mr. Darwins theory of pangenesis in a very wonderful manner, taught that the semen is a con316flux of molecules derived from every part of the body, and thus strove to account for the hereditary transmission of individual peculiarities to offspring.202A stream of living fire, a ripple of all the colours of the rainbow. Balmayne shut the cases as if jealous of the eyes of the night.このページの先頭です
ONE:Closer and closer together came the swift turbine propelled yacht and the surface-skimming hydroplane.Machinery subjected to destructive wear, and to be operated at a distance from machine shopslocomotive engines for exampleif not constructed with standard dimensions, may, by the detention due to repairing, cause a loss and inconvenience equal to their value; if a shaft wheel bearing, or even a fitted screw bolt is broken, time must be allowed to make the parts new; and in order to fit them, the whole machine, or such of its details as have connection with the broken parts, must be taken to a shop in order to fit by trial.
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ONE:"Perhaps it was as well that Miss Lawrence took matters in her own hands and sent for you," he said thoughtfully. "At any rate, your presence may get us out of a certain degree of responsibility. The patient, if I may so call him, is quieter now, and you will have no difficulty with him. Of course, that is if he will see you at all. If not you will acquit us of any discourtesy."From Antwerp, which I could see clearly from the positions of the artillery near Waelhem, high columns of smoke rose up from the Belgian artillery, which was harassing the German positions.
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TWO:CHAPTER X
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THREE:Proceeding from these premises, the first thing should be to examine the action of existing valve gear, to determine where this want of the dead-stroke function can best be supplied, and to gain the aid of such suggestions as existing mechanism may offer, also to see how far the appliances in use may become a part of any new arrangement.
THREE:It is strange, considering the simplicity of construction and the very important office filled by machines for cutting on plane surfaces, that they were not sooner invented and applied in metal work. Many men yet working at finishing, can remember when all flat surfaces were chipped and filed, and that long after engine lathes had reached a state of efficiency and were generally employed, planing machines were not known. This is no doubt to be accounted for in the fact that reciprocal movement, except that produced by cranks or eccentrics, was unknown or regarded as impracticable for useful purposes until late years, and when finally applied it was thought impracticable to have such movements operate automatically. This may seem quite absurd to even an apprentice of the present time, yet such reciprocating movement, as a mechanical problem, is by no means so simple as it may at first appear.Standard gauging implements were introduced about the year 1840, by the celebrated Swiss engineer, John G. Bodmer, a [148]man who for many reasons deserves to be considered as the founder of machine tool manufacture. He not only employed gauges in his works to secure duplicate dimensions, but also invented and put in use many other reforms in manipulation; among these may be mentioned the decimal or metrical division of measures, a system of detail drawings classified by symbols, the mode of calculating wheels by diametric pitch, with many other things which characterise the best modern practice.
TWO:("Voluntary workmen will be enrolled from August 21st on the left bank of the Meuse, where details of the conditions will be made known.")
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We need not follow Platos investigations into the meaning of knowledge and the causes of illusion any further; especially as they do not lead, in this instance, to any positive conclusion. The general tendency is to seek for truth within rather than without; and to connect error partly with the disturbing influence of sense-impressions on the higher mental faculties, partly with the inherent confusion and instability of the phenomena whence those impressions are derived. Our principal concern here is to note the expansive power of generalisation which was carrying philosophy back again from man to Naturethe deep-seated contempt of Plato for public opinionand the incipient differentiation of demonstrated from empirical truth.Towards evening the major returned with his men, who in loud voices sounded forth all sorts of patriotic songs, elated because they had driven away the enemy. As he entered I addressed the major, who with a grand sweep of his arm called out to me: "You may go now; I have cleared the whole district.""A woman. I can't say more than that.""The experience was worth the money," the latter said. "My friend had arranged everything. I got our dear Balmayne in our clutches within an hour. And I said to him, 'Dog, where is Leona Lalage?' And he professed not to know. But we had means of our own, you understand, to make him speak. And he spoke at last. He told me where to find her. And where do you think it was?"Frequently Protestant services were held in the market-place, conducted by a parson, and the invariable beginning and end of that parson's allocution was: "There is one God; there must also be one Kaiser."
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