ONE: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.202We have now reached the great point on which the Stoic ethics differed from that of Plato and Aristotle. The two latter, while upholding virtue as the highest good, allowed external advantages like pleasure and exemption from pain to enter into their definition of perfect happiness; nor did they demand the entire suppression of passion, but, on the contrary, assigned it to a certain part in the formation of character. We must add, although it was not a point insisted on by the ancient critics, that they did not bring out the socially beneficent character of virtue with anything like the distinctness of their successors. The Stoics, on the other hand, refused to admit that there was any good but a virtuous will, or that any useful purpose could be served by irrational feeling. If the passions agree with virtue they are superfluous, if they are opposed to it they are mischievous; and once we give them the rein they are more likely to disagree with than to obey it.5222 The severer school had more reason on their side than is commonly admitted. Either there is no such thing as duty at all, or duty must be paramount over every other motivethat is to say, a perfect man will discharge his obligations at the sacrifice of every personal advantage. There is no pleasure that he will not renounce, no pain that he will not endure, rather than leave them unfulfilled. But to assume this supremacy over his will, duty must be incommensurable with any other motive; if it is a good at all, it must be the only good. To identify virtue with happiness seems to us absurd, because we are accustomed to associate it exclusively with those dispositions which are the cause of happiness in others, or altruism; and happiness itself with pleasure or the absence of pain, which are states of feeling necessarily conceived as egoistic. But neither the Stoics nor any other ancient moralists recognised such a distinction. All agreed that public and private interest must somehow be identified; the only question being, should one be merged in the other, and if so, which? or should there be an illogical compromise between the two. The alternative chosen by Zeno was incomparably nobler than the method of Epicurus, while it was more consistent than the methods of Plato and Aristotle. He regarded right conduct exclusively in the light of those universal interests with which alone it is properly concerned; and if he appealed to the motives supplied by personal happiness, this was a confusion of phraseology rather than of thought.
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THREE:The difference between how machinery is constructed and why it is so constructed, is a wide one. This difference the reader should keep in mind, because it is to the second query that the present work will be mainly addressed. There will be an attemptan imperfect one, no doubt, in some casesto deduce from practice the causes which have led to certain forms of machines, and to the ordinary processes of workshop manipulation. In the mind of a learner, whether apprentice or student, the strongest tendency is to investigate why certain proportions and arrangement are right and others wrongwhy the operations of a workshop are conducted in one manner instead of another? This is the natural habit of thought, and the natural course of inquiry and investigation is deductive."But I do not share these views," said Charlton. "I recognise this woman now, though she no longer wears any disguise. There stands my wife's murderess. I shall never be content till the world knows that."
THREE:"And what is the news in The Netherlands about the war?""Ren Lalage. As you are interested, and as you came here to assist me, madame, I don't mind going so far as to show you the picture. It came from a weekly paper----"
THREE:Leona closed the door behind her with a snap. She was alert and vigorous as a general in action now. She passed downstairs swiftly but firmly, and into the morning room. One by one she snapped up the electric lights till the whole room was bathed in a golden glow.
