- Software name: appdown
- Software type: Microsoft Framwork
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Impact wheels, or those driven by the percussive force of water, including the class termed turbine water-wheels, are at this time generally employed for heads of all heights.
The German artillery had taken up their positions here, and bombarded the forts in their immediate neighbourhood. These did not fail to answer, and rained shells on the enemy's batteries. One heard their hissing, which came nearer and nearer, until they fell on the slopes or the tops of the hills and burst with a terrific explosion. Many a time we saw this happen only a few hundred yards away. Then the air trembled, and I felt as if my legs were blown from underneath me. Broken windows too fell clattering on the "stoeps."If there are any who value Aristotle as a champion of spiritualism, they must take him with his encumbrances. If his philosophy proves that one part of the soul is immaterial, it proves equally that the soul, taking it altogether, is perishable. Not only does he reject Platos metempsychosis as inconsistent with physiology, but he declares that affection, memory, and reasoning are functions not of the eternal Nous, but of the whole man, and come to an end with his dissolution. As to the active Nous, he tells us that it cannot think without the assistance of the passive Nous, which is mortal. And there are various passages in the Nicomachean Ethics showing that he had faced this negation of a future life, and was perfectly resigned to its consequences.272 At one period of his life, probably when under the immediate influence of Plato, he had indulged375 in dreams of immortality; but a profounder acquaintance with natural science sufficed to dissipate them. Perhaps a lingering veneration for his teacher made him purposely use ambiguous language in reference to the eternity of that creative reason which he had so closely associated with self-consciousness. It may remind us of Spinozas celebrated proposition, Sentimus experimurque nos aeternos esse, words absolutely disconnected with the hope of a continued existence of the individual after death, but apparently intended to enlist some of the sentiment associated with that belief on the side of the writers own philosophy.
There is no use in entering upon detailed explanations of what a learner has before him. Shafts are seen wherever there is machinery; it is easy to see the extent to which they are employed to transmit power, and the usual manner of arranging them. Various text-books afford data for determining the amount of torsional strain that shafts of a given diameter will bear; explain that their capacity to resist torsional strain is as the cube of the diameter, and that the deflection from transverse strains is so many degrees; with many other matters that are highly useful and proper to know. I will therefore not devote any space to these things here, but notice some of the more obscure conditions that pertain to shafts, such as are demonstrated by practical experience rather than deduced from mathematical data. What is said will apply especially to what is called line-shafting for conveying and distributing power in machine-shops and other manufacturing establishments. The following propositions in reference to shafts will assist in understanding what is to follow:
"I regard that statement of his as highly significant," resumed Gregg, after a slight pause. "For, of course, if the Clockwork man really is, as suggested, a semi-mechanical being, then he could only have come from the future. So far as I am aware, the present has not yet evolved sufficiently even to consider seriously the possibility of introducing mechanical reinforcements into the human body, although there has been tentative speculation on the subject. We are thousands of years away from such a proposition; on the other[Pg 54] hand, there is no reason why it should not have already happened outside of our limited knowledge of futurity. It has often occurred to me that the drift of scientific progress is slowly but surely leading us in the direction of some such solution of physiological difficulties. The human organism shows signs of breaking down under the strain of an increasingly complex civilisation. There may be a limit to our power of adaptability, and in that case humanity will have to decide whether it will alter its present mode of living or find instead some means of supplementing the normal functions of the body. Perhaps that has, as I suggest, already happened; it depends entirely upon which road humanity has taken. If the mechanical side of civilisation has developed at its present rate, I see no reason why the man of the future should not have found means to ensure his efficiency by mechanical means applied to his natural functions."In the case of line shafting for manufactories, if the speed varies so much from that of the first movers on machines as to require one or more intermediate or countershafts, the expense would be very great; on the contrary, if countershafts can be avoided, there is a great saving of belts, bearings, machinery, and obstruction. The practical limit of speed for line shafts is in a great measure dependent upon the nature of the bearings, a subject that will be treated of in another place.
LXIV BY TWOS. MARCHOn the afternoon of the 23rd the hostile troops entered the town, and on that day the inhabitants had not to suffer, excepting from requisitions made. But the following evening it was suddenly on fire at various spots, and the soldiers began to shoot in all directions, making many victims. Before setting the houses on fire, with a liberal use of the lozenges mentioned already, the usurpers ransacked them and removed numerous pieces of valuable furniture. The Place d'Armes, the Place Lopold, the Rue St. Nicolas, Rue Rogier, and the Avenue de la Plante were almost entirely reduced to ashes. With the town-hall many valuable pictures were destroyed. The day following the conflagration they left off shooting at last, but the looting went on for days more.
"Go in and win," Balmayne whispered. "Always back your luck."