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ENGLISH 海信波乐多小镇The effect of tempering baths is as their conducting power; chemicals except as they may contribute to the conducting properties of a bath, may safely be disregarded. For baths, cold or ice water loaded with salt for extreme hardness, and warm oil for tools that are thin and do not require to be very hard, are the two extremes outside of which nothing is required in ordinary practice.4. To cause a movement of the valve after the hammer stops there must be an intermediate agent, that will continue to  act after the movement of the hammer drop has ceased.Symmetry, as an element in designs for machinery, is one of those unsettled matters which may be determined only in connection with particular cases; it may, however, be said that for all engineering implements and manufacturing machinery of every kind, there should be nothing added for ornament, or anything that has no connection with the functions of the machinery.
During the next days I found a hospitable domicile at the convent of the Sacred Heart on the Namur Canal ("Naamsche Vest"). It is a seminary for missionaries, and when I went to them for the first136 time I had a letter from their head, the "provincial" in The Netherlands, who sent the order that all the theological students should be transferred to The Netherlands as quickly as possible. They received me with the greatest kindness, and ever since I enjoyed their hospitality.
That the book was not published sooner is because I could not foresee more than others how terribly long the war would last; and I should have preferred to wait till the end in order to insert several reports which I know are being kept in the occupied part, in order to acquaint the whole world with the full truth about the behaviour of the Germans. As long as the Germans keep the upper hand in Belgium, such a publication cannot take place without danger to several persons.
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102For quite a quarter of an hour they seemed to proceed successfully, as obviously not one shell exploded in their neighbourhood. But suddenly all along their line dark masses several yards high rose up. This was the effect of numerous exceedingly well-aimed shells on the dry, loose sand. Soon the men were surrounded by those thick clouds of dust, and only during the first few minutes I saw here and there one of those shades in human form tumble down, evidently hit by one of the projectiles. Then I saw nothing for a long while, excepting the thick wall of dust, which seemed to remain standing up, for constantly the shells threw up anew the earth that had only just fallen down.A great share of the alleged improvements in machinery, when investigated will be found to consist in nothing more than the combination of several functions in one machine, the novelty of their arrangement leading to an impression of utility and increased effect.
Most of the difficulties which formerly pertained to drilling are now removed by machine-made drills which are manufactured and sold as an article of trade. Such drills do not require dressing and tempering or fitting to size after they are in use, make true holes, are more rigid than common solid shank drills, and will drill to a considerable depth without clogging.CHAPTER I
The arrangement of patterns with reference to having certain parts of castings solid and clean is an important matter, yet one that is comparatively easy to understand. Supposing the iron in a mould to be in a melted state, and to contain, as it always must, loose sand and 'scruff,' and that the weight of the dirt is to melted iron as the weight of cork is to water, it is easy to see where this dirt would lodge, and where it would be found in the castings. The top of a mould or cope, as it is called, contains the dirt, while the bottom or drag side is generally clean and sound: the rule is to arrange patterns so that the surfaces to be finished will come on the bottom or drag side."Are they genuine?"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.
5. The obvious means of attaining this independent movement of the valve gear, is by the momentum of some part set in motion by the hammer-drop, or by the force of gravity reacting on this auxiliary agent.These and similar questions were asked after a superficial examination of my papers, and, having answered them, I was allowed to go on. But at a certain moment an officer appeared, who summoned me to dismount, and asked for my papers. After a short examination he ordered a soldier to take me to the commanding officer at Riemst.CHAPTER I
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....3. Two elevations taken at right angles to each other, fix all points, and give all dimensions of parts that have their axis parallel to the planes on which the views are taken; but when a machine is complex, or when several parts lie in the same plane, three and sometimes four views are required to display all the parts in a comprehensive manner.
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