2021-04-17 10:24:19

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ENGLISH Physical strength, bone and muscle, must be elements in successful engineering experience; and if these things are not acquired at the same time with a mechanical education, it will be found, when ready to enter upon a course of practice, that an important element, the "propelling power," has been omitted.Whenever our escort fancied that they saw something, they stopped and called out to the supposed approaching persons: "Who goes there?" Some125times it was only some shrubs that they saw; at other times patrolling German soldiers. "Parole?" was asked: "Duisburg!" and after that answer they came nearer. At the station I was taken to an officer who sat at a table on the platform and had lit up his nearest surroundings by means of a paraffin-lamp. My little old man wept now so badly that he was quite unmanageable, and the officer made up his mind to get rid of him as quickly as possible.Professor Noyons took me all over the hospital, and if I should describe all I saw and heard there, that story alone would fill volumes. He took me, for example, to a boy of eight years old, whose shoulder was shattered by rifle-shots. His father and140 mother, four little brothers and a sister, had been murdered. The boy himself was saved because they thought that he was dead, whereas he was only unconscious. When I asked for his parents, brothers and sister, he put up his one hand and, counting by his little fingers, he mentioned their names.

A learner who goes from gearing and shafts to steam and hydraulics, from machine tools to cranes and hoisting machinery, will not accomplish much. The best way is to select at first an easy subject, one that admits of a great range of modification, and if possible, one that has not assumed a standard form of construction. Bearings and supports for shafts and spindles, [158] is a good subject to begin with."And did you not get anything to eat?"

"The burgomaster informs the population that any utterance contrary to the regulations will be severely punished. CHAPTER ICHAPTER XI. SHAFTS FOR TRANSMITTING POWER.

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On this side hundreds of soldiers were standing; they had taken off their uniforms in the fierce heat, and were busy loading and unloading and changing horses. From time to time the entire scene was hidden by the smoke from numerous burning houses at Lixhe, quite near the river. I walked in the most casual way, in an unconcerned attitude, looked calmly at some of the houses I passed, and which were for the greater part destroyed. The walls were pierced by bullets, the rooms generally burnt out; in the front gardens lay all sorts of furniture, dragged out of the house and then smashed to pieces.The first impressions an apprentice forms of the smith-shop as a department of an engineering establishment is that it is a black, sooty, dirty place, where a kind of rough unskilled labour is performeda department which does not demand much attention. How far this estimate is wrong will appear in after years, when experience has demonstrated the intricacies and difficulties of forging, and when he finds the skill in this department is more difficult to obtain, and costs more relatively than in any other. Forging as a branch of work requires, in fact, the highest skill, and is one where the operation continually depends upon the judgment of the workman, which neither power nor machines can to any extent supplant. Dirt, hard labour, and heat deter men from learning to forge, and create a preference for the finishing shop, which in most places makes a disproportion between the [102] number of smiths and finishers.19

In studying improvements with a view to practical gain, a learner can have no reasonable hope of accomplishing much in fields already gone over by able engineers, nor in demonstrating anything new in what may be called exhausted subjects, such as steam-engines or water-wheels; he should rather choose new and special subjects, but avoid schemes not in some degree confirmed by existing practice."Oh, but, sir, Wolff confirmed these reports.""You see, sir, the bridge across the Meuse has been destroyed, and in order to get back I had to walk first towards ... towards ... Lige ... and ... and ... and then they ferried me over somewhere down there, and told me that I had to go along the canal to get to Maastricht."

I then tried to find the nunnery of the S?urs de la Misricorde, where one of my cousins had taken the veil. At last, in the Rue des Clarisses I found the huge door of the monastery, and rang the bell. After a few moments a small trellised shutter in the stout door was opened ajar, and a tremulous voice asked in French what I wanted. I assumed that42 it was one of the nuns, but I could see nothing through that narrow jar.In compression processes no material is cut away as in cutting or grinding, the mass being forced into shape by dies or forms that give the required configuration. The action of compressing machines may be either intermittent, as in the case of rolling mills; percussive, as in steam hammers, where a great force acts throughout a limited distance; or gradual and sustained, as in press forging. Machines of application, for abrading or grinding, are constantly coming more into use; their main purpose being to cut or shape material too hard to be acted upon by compression or by cutting processes. It follows that the necessity for machines of this kind is in proportion to the amount of hard material which enters into manufactures; in metal work the employment of hardened steel and iron is rapidly increasing, and as a result, grinding machines have now a place among the standard machine tools of a fitting shop.Early next morning I walked through the streets of Lige, dull and depressed, deploring the fact that such clumsy, heavy iron monsters had been able to crush this stout defence and such men. As I reached the Place du March, there arrived three hundred disarmed Belgian warriors, escorted by a strong German force. They stopped in the square, and soon hundreds of the people of Lige crowded around them. They were the defenders of Fort Pontisse.

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We entered another caf, and once more I shouted51 for the inhabitants at the top of my voice. At last I heard a feeble sound somewhere in the hall, which I entered, but as I saw no one there, I called out once more. Then I heard distinctly, and knew whence the answer came. I opened a door, behind which stairs led to the cellar, and from there I was at last able to speak to some of the Herstal people. I heard that all of them stayed in their cellars for fear of the bombardment.At this point will occur one of those mechanical problems which requires what may be called logical solution. The valve must be moved by the drop; there is no other moving mechanism available; the valve and drop must besides be connected, to insure coincident action, yet the valve requires to move when the drop is still. Proceeding inductively, it is clear that a third agent must be introduced, some part moved by the drop, which will in turn move the valve, but this intermediate agent so arranged that it may continue to move after the hammer-drop has stopped.2. Drawings in true elevation or in section are based upon flat planes, and give dimensions parallel to the planes in which the views are taken.

CHAPTER VI

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Apr-17 10:24:19