THREE:Heavy as were these blows, a few hours' sleep braced Leona Lalage for what she knew to be a trying ordeal. By the time that breakfast was a thing of the past she had sketched out a new plan of campaign. The terrible unseen force from behind had driven her from her strong position. In future she would have to recognize the fact that she was hopelessly beaten, and all that she could expect now was to cover up her tracks and prevent the final solution of the mystery.Machine motion is mainly rotary; and as rotary motion is accomplished by cylindrical parts such as shafts, bearings, pulleys and wheels, we find that the greater share of machine tools are directed to preparing cylindrical forms. If we note the area of the turned, bored and drilled surface in ordinary machinery, and compare with the amount of planed surface, we will find the former not less than as two to one in the finer class of machinery, and as three to one in the coarser class; from this may be estimated approximately the proportion of tools required for operating on cylindrical surfaces and plane surfaces; assuming the cutting tools to have the same capacity in the two cases, the proportion will be as three to one. This difference between the number of machines required for cylindrical and plane surfaces is farther increased, when we consider that tools act continually on cylindrical surfaces and intermittently on plane surfaces.
FORE:Yet throughout the philosophy of Plato we meet with a tendency to ambiguous shiftings and reversions of which, here also, due account must be taken. That curious blending of love and hate which forms the subject of a mystical lyric in Mr. Brownings Pippa Passes, is not without its counterpart in purely rationalistic discussion. If Plato used the Socratic method to dissolve away much that was untrue, because incomplete, in Socratism, he used it also to absorb much that was deserving of development in Sophisticism. If, in one sense, the latter was a direct reversal of his masters teaching, in another it served as a sort of intermediary between that teaching and the unenlightened consciousness of mankind. The shadow should not be confounded with the substance, but it might show by contiguity, by resemblance, and by contrast where the solid reality lay, what were its outlines, and how its characteristic lights might best be viewed.Meanwhile a series of Stoic thinkers had also been feeling their way towards a compromise with Plato and Aristotle, which, so far as it went, was a step in the direction of spiritualism. We have seen, in a former chapter, how one of the great distinguishing marks of Stoicism, as compared with the systems immediately preceding it, was the substitution of a pervading monism for their antithesis between God and the world, between heaven and earth, between reason and sense. It will be remembered also that this monistic creed was associated with a return to the Heracleitean theory that the world is periodically destroyed by fire. Now, with reference to three out of these four points, Bothus, a Stoic contemporary of Carneades, returned to the Aristotelian doctrine. While still holding to the materialism of his own school, including a belief in the corporeal nature of the divinity, he separated God from the world, and represented him as governing its movements from without; the world itself he maintained to be eternal; and in the mind of man he recognised reason or nous as an independent source of conviction. In163 his cosmology, Bothus was followed by a more celebrated master, Panaetius, who also adopted the Aristotelian rationalism so far as to deny the continued existence of the soul after death, and to repudiate the belief in divination which Stoicism had borrowed from popular superstition; while in psychology he partially restored the distinction between life and mind which had been obliterated by his predecessors.259 The dualistic theory of mind was carried still further by Posidonius, the most eminent Stoic of the first century B.C. This very learned and accomplished master, while returning in other points to a stricter orthodoxy, was led to admit the Platonic distinction between reason and passion, and to make it the basis of his ethical system.260 But the Platonising tendencies of Posidonius had no more power than those of Antiochus to effect a true spiritualistic revival, since neither they nor any of their contemporaries had any genius for metaphysical speculation; while the increased attention paid to Aristotle did not extend to the fundamental principles of his system, which, even within the Peripatetic school, were so misconceived as to be interpreted in a thoroughly materialistic sense.261
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TWO:It is a matter of courtesy in the usages of a shop, and one of expediency to a learner, to ask questions from those who are presumed to be best informed on the subject to which the questions relate; and it is equally a matter of courtesy to ask questions of different workmen, being careful, however, never to ask two different persons the same question, nor questions that [169] may call out conflicting answers.
TWO:Our philosopher appears to more advantage as a critic than as a religious dogmatist. He meets the Stoic belief in Providence by pointing out the undeniable prevalence of evils which omnipotent benevolence could not be supposed to tolerate; the Stoic optimism, with its doctrine, still a popular one, that all things were created for the good of man, by a reference to the glaring defects which, on that hypothesis, would vitiate the arrangements of Nature; the Stoic appeal to omens and prophecies by showing the purely accidental character of their fulfilment.160 But he trusts most of all to a radically different explanation of the world, an explanation82 which everywhere substitutes mechanical causation for design. Only one among the older systemsthe atomism of Democritushad consistently carried out such a conception of Nature, and this, accordingly, Epicurus adopts in its main outlines.There is, perhaps, no one who has achieved a successful experience as an engineer but will acknowledge the advantages derived from early efforts to generate original designs, and none who will not admit that if their first efforts had been more carefully directed, the advantages gained would have been greater.
