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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.202The principles of all mechanism for handling loads should be such as to place the power, the rate of movement, and the direction of the force, within the control of an operator, which, as has been pointed out, is the same thing in effect as the action of the human hands.
ONE:Jeff, the so-called Mr. Everdail, and the pilot and passenger of the seaplane, as well as the presumably injured man whom they had not seenall these were members of an international band of robbers, Sandy claimed.
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FORE:There it appeared that my papers were in good order, but at the same time I was informed that I was to be taken to the commanding officer at the station and could not be allowed to leave Bilsen for the present. I was escorted through the townlet, which appeared to be entirely deserted; but now and then somebody came to his front-door to watch the latest victim of the Germans being led past. At the station I was pushed without much courtesy into a keep where six other civilians sat, who had been picked up as being at large, and whose faces were now covered with a cold perspiration from fear, because they were firmly convinced that by and by they would be shot.
318II.CHAPTER XVIII. LAWRENCE IS MYSTERIOUS.They had given up."Well"this to a private"you call the patrol; this man must be arrested."
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