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ENGLISH 苍井寿司店江门These conditions of short range and great force are best attained by what may be termed percussion, and by machines which act by blows instead of positive and gradual pressure; hence we find that hand and power hammers are the most common tools among those of the smith-shop."If you don't drink with us you are not our friend." At the same time he beat the ground with his rifle-butt and, willy-nilly, I had to drink.The inhabitants were driven to the station, where the husbands were cruelly separated from their wives and several persons were shot. Other men were escorted to a place behind the station, and their wives and children were told that those men were going to be shot. The poor things heard indeed the click-clack of the rifles and thought that their dear ones were dead. However, many returned later, and their "shooting" seems to have been a mere sham.

Immediately after the church was set on fire, the dean was arrested, as well as the burgomaster and five reverend sisters. These last-mentioned had been in prison a fortnight, when at last the Germans discovered that the little sisters were of German nationality. The Very Reverend Dean had been treated very badly during his captivity.

"Yes," I reply, "it is bad, very bad, but is it really all true?"

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I have explained already in the chapter "Round about Lige" that I myself was duped occasionally, for example, by the story of the three hundred civilians who had been shot. To my mind these violent acts at the beginning of the war were part and parcel of the system of frightfulness, by which the Germans tried to scare the population and indirectly the hostile armies, at the same time rousing their own soldiers to anger and fury.So I thought that I might chance it. The house was some distance from the station, near the railway line; opposite stood a sort of goods station guarded by six soldiers. Before entering the house I had a chat with them, for I thought that if I explained my position and told them that the commanding officer gave me permission to pass the night in that house, I should be much safer if anything should happen during the night, because they knew then that they had to deal with a neutral journalist. They might moreover warn me should the fire that was raging all around reach that house. So I told the whole story to these fellows, who were also more than half drunk, showed them my passports, gave them some cigars, and after a friendly chat went123 to the old man who was to put me up for the night.I roamed about aimlessly in a scorching heat. Whither? I did not know myself. I did not know Louvain and met nobody whom I might ask something. I came near a couple of streets that were only ruins; the walls collapsed against each other and filled the roadway with rubbish, so that sometimes I could not see whether I walked on or beside the place where the houses used to stand.

It is never enough to know that any piece of work is commonly constructed in some particular manner, or that a proposition is generally accepted as being correct; a reason should be sought for. Nothing is learned, in the true sense, until the reasons for it are understood, and it is by no means sufficient to know from observation alone that belts are best for high speeds, that gearing is the best means of forming angles in transmitting power, or that gearing consumes more power, and that belts produce less jar and noise; the principles which lie at the bottom must be reached before it can be assumed that the matter is fairly understood.Although a system but recently developed, the employment of hydraulic machinery for transmitting and applying power has reached an extended application to a variety of purposes, and gives promise of a still more extensive use in future. Considered as a means of transmitting regularly a constant amount [54] of power, water apparatus is more expensive and inferior in many respects to belts or shafts, and its use must be traced to some special principle involved which adapts hydraulic apparatus to the performance of certain duties. This principle will be found to consist in storing up power in such a manner that it may be used with great force at intervals; and secondly, in the facilities afforded for multiplying force by such simple mechanism as pumps. An engine of ten-horse-power, connected with machinery by hydraulic apparatus, may provide for a force equal to one hundred horse-power for one-tenth part of the time, the power being stored up by accumulators in the interval; or in other words, the motive power acting continuously can be accumulated and applied at intervals as it may be required for raising weights, operating punches, compressive forging, or other work of an intermittent character. Hydraulic machinery employed for such purposes is more simple and inexpensive than gearing and shafts, especially in the application of a great force acting for a considerable distance, and where a cylinder and piston represent a degree of strength which could not be attained with twice the amount of detail, if gearing, screws, levers, or other devices were employed instead.

CHAPTER XXIII. FORGING.I had walked another three miles, when a big crowd of fugitives met me. They seemed to have come a long way, for the majority could hardly walk on, and had taken off their shoes and boots, on account of the scorching heat, going on barefooted in the shade of the tall trees. It was a procession, numbering hundreds of men, women, and children. The aged were supported, the babies carried. Most of them had a small parcel on their back or under their arm. They seemed tired to death, had dark red faces, and betrayed great fear and nervousness. I crossed the road to speak to them, and as soon as they noticed it the whole crowd, numbering hundreds of people, stood still, creeping closer together, women and girls trying hard to hide themselves behind the men, and these doffed their caps timidly.

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It is well for an apprentice to invent or demonstrate all that he canthe more the better; but as explained in a previous place, what is attempted should be according to some system, and with a proper object. Time spent groping in the dark after something of which no definite conception has been formed, or for any object not to fill an ascertained want, is generally time lost. To demonstrate or invent, one should begin methodically, like a bricklayer builds a wall, as he mortars and sets each brick, so should an engineer qualify, by careful study, each piece or movement that is added to a mechanical structure, so that when done, the result may be useful and enduring."Well, it seems that the civilians cannot understand that only soldiers may fight soldiers, and for that reason the whole place has been set on fire."

The auxiliary departments, if disposed about an erecting shop in the centre, should be so arranged that material which has to pass through two or more departments can do so in the order of the processes, and without having to cross the erecting shop. Casting, boring, planing, drilling, and fitting, for example, should follow each other, and the different departments be arranged accordingly; whenever a casting is moved twice over the same course, it shows fault of arrangement and useless expense. The same rule applies to all kinds of material.For implements procure two drawing-boards, forty-two inches long and thirty inches wide, to receive double elephant paper; have the boards plain without cleets, or ingenious devices for fastening the paper; they should be made from thoroughly seasoned lumber, at least one and one-fourth inches thick; if thinner they will not be heavy enough to resist the thrust of the T squares.It is not always an easy matter to hit upon an object to which designs may be directed; and although at first thought it may seem that any machine, or part of a machine, is capable of improvement, it will be found no easy matter to detect existing [153] faults or to conceive plans for their remedy.

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