2021-04-17 01:27:12

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ENGLISH The dear lady rapped it out in such a decided tone of voice that I desisted. I told my trouble to the proprietor of a caf where I took a glass of beer; he, examining my papers, placed confidence in me, and got me a rickety thing, for which I paid twenty-two francs.I saw some extremely poor people, very old and stiff, to whom walking was nearly impossible. A Bavarian soldier escorted them. He had his rifle slung across his back and in both hands carried the luggage of the unfortunate creatures. He seemed to have come a long way already, for he looked tired, and the perspiration ran down his face. Although it is only natural to assist one's fellow-creatures, this scene touched me, for hitherto I had seen the Germans commit rough, inhuman deeds only.("Voluntary workmen will be enrolled from August 21st on the left bank of the Meuse, where details of the conditions will be made known.")

Cores expand when heated, and require an allowance in their dimensions the reverse from patterns; this is especially the case when the cores are made upon iron frames. For cylindrical cores less than six inches diameter, or less than two feet long, expansion need not be taken into account by pattern-makers, but for large cores careful calculation is required. The expansion of cores is as the amount of heat imparted to them, and the amount of heat taken up is dependent upon the quantity of metal that may surround the core and its conducting power.To point out some of the leading points or conditions to be taken into account in pattern-making, and which must be understood in order to manage this department, I will refer to them in consecutive order.

I do not refer to questions of mechanical construction, although the remark might be true if applied in this sense, but to the kind of devices that may be best employed in certain cases.Machinery of transmission being generally a part of the fixed plant of an establishment, experiments cannot be made to institute comparisons, as in the case of machines; besides, there are special or local considerationssuch as noise, danger, freezing, and distanceto be taken into account, which prevent any rules of general application. Yet in every case it may be assumed that some particular plan of transmitting power is better than any other, and that plan can best be determined by studying, first, the principles of different kinds of mechanism and its adaptation to the special conditions that exist; and secondly, precedents or examples.Boring may be called internal turning, differing from external turning, because of the tools performing the cutting movement, and in the cut being made on concave instead of convex surfaces; otherwise there is a close analogy between the operations of turning and boring. Boring is to some extent performed on lathes, either with boring bars or by what is termed chuck-boring, in the latter the material is revolved and the tools are stationary.

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As I stood there looking at the ruins of what was once so fine a house, a small group of refugees approached, carrying as usual their miserable parcels in which they had hurriedly collected the things that had the least value. As they saw me they shuddered and shivered and crept closer together. Most of them wept and sobbed, and their faces were twisting nervously.

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There I was left! After waiting a while I rang the bell once more, and once more the little shutter was opened in the same timid manner.Some hints will now be given relating to apprentice experience in a workshop, such matters being selected as are most likely to be of interest and use to a learner. CHAPTER X

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Modern engineers of the abler class are so thoroughly in accord in this matter of ornamentation, both in opinion and practice, that the subject hardly requires to be mentioned, and it will be no disadvantage for a learner to commence by cultivating a contempt for whatever has no useful purpose. Of existing practice it may be said, that in what may be called industrial machinery, the amount of ornamentation is inverse as the amount of engineering skill employed in preparing designs.There I was left! After waiting a while I rang the bell once more, and once more the little shutter was opened in the same timid manner.

The town was on fire, and ruddy smoke hovered over it. Deserted like a wilderness, not a soul moved in the streets. The first street I entered was the Rue de la Station. Large, imposing mansions used to stand here, but the devouring fire consumed even the last traces of former greatness.The safety, simplicity, and reliable action of hydraulic machinery has already led to its extensive employment for moving and lifting weights, and it is fair to assume that the importance and success of this invention fully entitle it to be classed as one of the most important that has been made in mechanical engineering during fifty years past. The application of hydraulic force in operating the machinery used in the processes for steel Bessemer manufacture, is one of the best examples to illustrate the advantages and principles of the hydraulic system. Published drawings and descriptions of Bessemer steel plant explain this hydraulic machinery.

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Apr-17 01:27:12