2021-04-18 09:44:57

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ENGLISH INTRODUCTIONThat is not evidence however, for how did they get the information? From my own experience I make bold to say with the greatest confidence that these reports came from German sources only, whereas there was not any ground for them.I had to walk along the very edge of the unstable bridge in order to avoid the wheels of the passing carriages, which shook the whole bridge and made the rather loose boards clatter. In the meantime, at no considerable distance, some shells fell in the Meuse, fired at the bridge from Fort Pontisse. Yet, I did not mind it at all, as all these new experiences stunned me, so to speak; the incessant hellish noises of the batteries, the burning houses, the smoke swooping down, the excited soldiers....

The following are suggested as subjects which may be studied in connection with lathes and turning: the rate of cutting movement on iron, steel, and brass; the relative speed of the belt cones, whether the changes are by a true ascending scale from the slowest; the rate of feed at different changes estimated like the threads of a screw at so many cuts per inch; the proportions of cone or step pulleys to insure a uniform belt tension, the theory of the following rest as employed in turning flexible pieces, the difference between having three or four bearing points for centre or following rests; the best means of testing the truth of a lathe. All these matters and many more are subjects not only of interest but of use in learning lathe manipulation, and their study will lead to a logical method of dealing with problems which will continually arise.Another object gained by equal action on both sides of large pieces is the quality of the forgings produced, which is generally improved by the rapidity of the shaping processes, and injured by too frequent heating.

"Sister," I said, "I am a cousin of S?ur Eulalie, and should like to see her, to know how she is and take her greetings to her family in The Netherlands."Die-cutting produces screws which may not be true, but are still sufficiently accurate for most uses, such as clamping and joining together the parts of machinery or other work.

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May all the nations of the world after the war collaborate to compensate Louvain for her martyrdom, see that this city shall be restored to her former, happy prosperity, and get a library which approaches as much as possible the one she lost. The Germans can probably do their part by investigating where the motor-cars went which left the Halls on that wretched Tuesday night, heavily laden with books.

The material when in its crude state not only consists of various things, such as iron, sand, coal, and lumber, that must be kept separate, but the bulk of such materials is much greater than their finished product. It is therefore quite natural to receive such material on the outside or "periphery" of the works where there is the most room for entrances and for the separate storing of such supplies. Such an arrangement is of course only possible where there can be access to a considerable part of the boundary of a works, yet there are but few cases where a shop cannot be arranged in general upon the plan suggested. By receiving material on the outside, and delivering the finished product from the centre, communications between the departments of an establishment are the shortest that it is possible to have; by observing the plans of the best establishments of modern arrangement, especially those in Europe, it may be seen that this system is approximated in many of them, especially in establishments devoted to the manufacture of some special class of work.Irregularity of cooling may be the result of unequal conducting power in different parts of a mould or cores, or it may be [98] from the varying dimensions of the castings, which contain heat as their thickness, and give it off in the same ratio. As a rule, the drag or bottom side of a casting cools first, especially if a mould rests on the ground, and there is not much sand between the castings and the earth; this is a common cause of unequal cooling, especially in large flat pieces. Air being a bad conductor of heat, and the sand usually thin on the cope or top side, the result is that the top of moulds remain quite hot, while at the bottom the earth, being a good conductor, carries off the heat and cools that side first, so that the iron 'sets' first on the bottom, afterwards cooling and contracting on the top, so that castings are warped and left with inherent strains.Finishing, therefore, it must be borne in mind, is but one among several processes, and that the fitting department is but one out of four or more among which attention is to be divided.

(1.) What is gained by arranging a machine to perform several different operations?(2.) What may be lost by such combination?(3.) What is the main expense attending the operation of machine tools?(4.) What kind of improvement in machine tools produces the most profitable result?(5.) What are the principal causes which have led to machine combinations.This is only a short record of the destruction of Louvain, the truthfulness of which will be firmly and fully established after the war by extensive, accurately drawn up declarations.Was the gun I had seen there one of the notorious forty-two centimetre monsters? I should not like to wager my head in affirming that. It was an inordinately unwieldy and heavy piece of ordnance, but during the first days of the war nothing or very little had yet been said or written about these forty-two's, and I did not pay sufficient attention to the one I saw. Only after the fall of Loncin did all those articles about the forty-two's appear in the papers, and the Germans certainly asserted that they destroyed Loncin by means of such a cannon.

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"At dawn the bombardment started again, but only the front was seriously damaged. The garrison stood as firm as a rock. Here and there the beginnings of a fire were soon extinguished.

31The reasons that favour combination of functions in machines, and the effects that such combinations may produce, are so various that the problem has led to a great diversity of opinions and practice among both those who construct and even those who employ machines. It may be said, too, that a great share of the combinations found in machines, such as those to turn [68], mill, bore, slot, and drill in iron fitting, are not due to any deliberate plan on the part of the makers, so much as to an opinion that such machines represent a double or increased capacity. So far has combination in machines been carried, that in one case that came under the writer's notice, a machine was arranged to perform nearly every operation required in finishing the parts of machinery; completely organised, and displaying a high order of mechanical ability in design and arrangement, but practically of no more value than a single machine tool, because but one operation at a time could be performed.

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Apr-18 09:44:57