ONE:(1.) Why have belts been found better than shafts for transmitting power through long distances?(2.) What are the conditions which limit the speed of belts?(3.) Why cannot belts be employed to communicate positive movement?(4.) Would a common belt transmit motion positively, if there were no slip on the pulleys?(5.) Name some of the circumstances to be considered in comparing belts with gearing or shafts as a means of transmitting power.CHAPTER XXIX. A KNOCK AT THE DOOR.
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THREE:Lucretius has been called Romes only great speculative genius. This is, of course, absurd. A talent for lucid ex101position does not constitute speculative genius, especially when it is unaccompanied by any ability to criticise the opinions expounded. The author of the De Rerum Natura probably had a lawyers education. He certainly exhibits great forensic skill in speaking from his brief. But Cicero and Seneca showed the same skill on a much more extensive scale; and the former in particular was immensely superior to Lucretius in knowledge and argumentative power. Besides, the poet, who was certainly not disposed to hide his light under a bushel, and who exalts his own artistic excellences in no measured terms, never professes to be anything but a humble interpreter of truths first revealed to his Greek instructors vivid intellect. It has, indeed, been claimed for Lucretius that he teaches a higher wisdom than his acknowledged guide.195 This assertion is, however, not borne out by a careful comparison between the two.196 In both there is the same theory of the universe, of man, and of the relations connecting them with one another. The idea of Nature in Lucretius shows no advance over the same idea in Epicurus. To each it expresses, not, as with the Stoics, a unifying power, a design by which all things work together for the best, but simply the conditions of a permanent mechanical aggregation. When Lucretius speaks of foedera Naturai, he means, not what we understand by laws of nature, that is, uniformities of causation underlying all phenomenal differences, to understand which is an exaltation of human dignity through the added power of prevision and control which it bestows, but rather the limiting possibilities of existence, the barriers against which human hopes and aspirations dash themselves in vainan objective logic which guards us against fallacies instead of enabling us to arrive at positive conclusions. We have here the pervadingly negative character of Epicureanism,102 though probably presented with something of Roman solemnity and sternness. The idea of individuality, with which Lucretius has also been credited, occupies but a small place in his exposition, and seems to have interested him only as a particular aspect of the atomic theory. The ultimate particles of matter must be divided into unlike groups of units, for otherwise we could not explain the unlikenesses exhibited by sensible objects. This is neither the original Greek idea, that every man has his own life to lead, irrespective of public opinion or arbitrary convention; nor is it the modern delight in Natures inexhaustible variety as opposed to the poverty of human invention, or to the restrictions of fashionable taste. Nor can we admit that Lucretius developed Epicurean philosophy in the direction of increased attention to the external world. The poet was, no doubt, a consummate observer, and he used his observations with wonderful felicity for the elucidation and enforcement of his philosophical reasoning; but in this respect he has been equalled or surpassed by other poets who either knew nothing of systematic philosophy, or, like Dante, were educated in a system as unlike as possible to that of Epicurus. There is, therefore, every reason for assuming that he saw and described phenomena not by virtue of his scientific training, but by virtue of his artistic endowment. And the same may be said of the other points in which he is credited with improvements on his masters doctrine. There is, no doubt, a strong consciousness of unity, of individuality, and of law running through his poem. But it is under the form of intuitions or contemplations, not under the form of speculative ideas that they are to be found. And, as will be presently shown, it is not as attributes of Nature but as attributes of life that they present themselves to his imagination.We have seen how, in accordance with this view, each principle is perfected by looking back on its source.491 Thus330 the activity of the world-soul, so far as it is exercised for the benefit of what comes after and falls beneath her, is an anomaly only to be accounted for by her inferior place in the system of graduated descent; or else by the utter impotence of Matter, which is incapable of raising itself into Form by a spontaneous act of reflection, and can only passively receive the images transmitted to it from above, without being able to retain even these for any time. Nay, here also, what looks like creative energy admits of being assimilated more or less closely to an exercise of idealising thought. It is really for her own sake that the Soul fills what lies beyond her with life and light, not, like Platos Soul, from pure disinterested joy in the communication and diffusion of good. It is because she recoils with horror from darkness and nonentity that she shapes the formless substance into a residence for herself, on the model of the imperial palace whence she came. Thus the functions of sensation, nutrition, and reproduction are to be regarded as so many modes of contemplation. In the first, the Soul dwells on the material images which already exist; in the second and third, she strives to perpetuate and multiply them still further. And the danger is that she may become so enthralled by her own creation as to forget the divine original after which it is formed.492 Should she yield to the snare, successive transmigrations will sink her lower and lower into the depths of animalism and material darkness. To avoid this degradation, to energise with the better part of our nature, is to be good. And with the distinction between good and evil, we pass from the metaphysical to the ethical portion of the system.
THREE:
THREE:Every one who uses tools should understand how to temper them, whether they be for iron or wood. Experiments with tempered tools is the only means of determining the proper degree of hardness, and as smiths, except with their own tools, have to rely upon the explanations of others as to proper hardening, it follows that tempering is generally a source of complaint.
