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"Say," the other whispered fiercely. "Poor Leon--is he dead?"I understood and respected the restraint of the Belgian primate, who went on then:In constructing patterns where it is optional whether to employ cores or not, and in preparing drawings for castings which may have either a ribbed or a cored section, it is nearly always best to employ cores. The usual estimate of the difference between the cost of moulding rib and cored sections, as well as of skeleton and cored patterns, is wrong. The expense of cores is often balanced by the advantage of having an 'open mould,' that is accessible for repairs or facing, and by the greater durability and convenience of the solid patterns. Taking, for example, a column, or box frame for machinery, that might be made either with a rib or a cored section, it would at first thought seem that patterns for a cored casting would cost much more by reason of the core-boxes; but it must be remembered that in most patterns labour is the principal expense, and what is lost in the extra lumber required for a core-box or in making a solid pattern is in many cases more than represented in the greater amount of labour required to construct a rib pattern.
THREE:5. Every part laid down has something to govern it that may be termed a "base"some condition of function or position which, if understood, will suggest size, shape, and relation to other parts. By searching after a base for each and every part and detail, the draughtsman proceeds upon a regular system, continually maintaining a test of what is done. Every wheel, shaft, screw or piece of framing should be made with a clear view of the functions it has to fill, and there are, as before said, always reasons why such parts should be of a certain size, have such a speed of movement, or a certain amount of bearing surface, and so on. These reasons or conditions may be classed as expedient, important, or essential, and must be estimated accordingly. As claimed at the beginning, the designs of machines can only in a limited degree be determined by mathematical data. Leaving out all considerations of machine operation with which books have scarcely attempted to deal, we have only to refer to the element of strains to verify the general truth of the proposition.Bruce nodded. He was beginning to have some feeling of hope.
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TWO:Here I also saw in action one of the 30?5 cm. Austrian howitzers mentioned before. The clumsy204 monster was constantly being shunted on a rail forward and backward, and at long intervals sent a gigantic projectile to the threatened quarters. The sound was terrific, and the pressure of the air made people at a great distance tremble on the ground. The Austrian artillerists were still equipped as if they had to fight in a rough, mountainous country; the soles of their shoes were all over covered with hobnails.
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TWO:"Freedom and revenge," she murmured. "What good words they are. Tomorrow! Well, tomorrow shall be my destruction or my Waterloo!"By examining into the facts, an apprentice will find that all truly successful establishments have been founded and built upon the mechanical abilities of some person or persons whose skill formed a base upon which the business was reared, and that true skill is the element which must in the end lead to permanent success. The material and the labour which make up the first cost of machines are, taking an average of various classes, nearly equally divided; labour being in excess for the finer class of machinery, and the material in excess for the coarser kinds of work. The material is presumed to be purchased at the same rates by those of inferior skill as by those that are well skilled, so that the difference in the first, or manufacturing cost of machinery, is determined mainly by skill.
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TWO:That 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.



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< Even before that, on August 11th I sent a communication, by post or cable (De Tijd, No. 20353), in which the following is found:"Well, I can and I can't," Lawrence said thoughtfully. "I'm puzzled, of course, and I am very much interested in this kind of thing. But really I am puzzled over one of the most remarkable coincidences that ever happened in the experience of a man who has made a pretty penny out of coincidences. In this instance 'the long arm' has taken a form that is positively uncanny."One not accustomed to manual labour will, after commencing, find his limbs aching, his hands sore; he will feel exhausted both at the beginning and at the end of a day's work. These are not dangerous symptoms. He has only to wait until his system is built up so as to sustain this new draught upon its resources, and until nature furnishes a power of endurance, which will in the end be a source of pride, and add a score of years to life. Have plenty of sleep, plenty of plain, substantial food, keep the skin clean and active, laugh at privations, and cultivate a spirit of self-sacrifice and a pride in endurance that will court the hardest and longest efforts. An apprentice who has not the spirit and firmness to endure physical labour, and adapt himself to the conditions of a workshop, should select some pursuit of a nature less aggressive than mechanical engineering.
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