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TWO:"Because I saw you--you and your infamous accomplice, Balmayne."An apprentice may get a clear idea of this venting process by inspecting tubular core barrels, such as are employed in moulding pipes or hollow columns, or by examining ordinary cores about a foundry. Provision of some kind to 'carry off the vent,' as it is termed by moulders, will be found in every case. The venting of moulds is even more important than venting cores, because core vents only carry off gas generated within the core itself, while the gas from its exterior surface, and from the whole mould, has to find means of escaping rapidly from the flasks when the hot metal enters.
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TWO:This last sentence brings the matter into a tangible form, and indicates what the subject of gain should have to do with what an apprentice learns of machine construction. Success in an engineering enterprise may be temporarily achieved by illegitimate meanssuch as misrepresentation of the capacity and quality of what is produced, the use of cheap or improper material, or by copying the plans of others to avoid the expense of engineering servicebut in the end the permanent success of an engineering business must rest upon the knowledge and skill that is connected with it.A few years ago, or even at the present time, many school-books in use which treat of mechanics in connection with natural philosophy are so arranged as to hinder a learner from grasping a true conception of force, power, and motion; these elements were confounded with various agents of transmission, such as wheels, wedges, levers, screws, and so on. A learner was taught to call these things "mechanical powers," whatever that may mean, and to compute their power as mechanical elements. In this manner was fixed in the mind, as many can bear witness, an erroneous conception of the relations between power and the means for its transmission; the two things were confounded together, so that years, and often a lifetime, has not served to get rid of the idea of power and mechanism being the same. To such teaching can be traced nearly all the crude ideas of mechanics so often met with among those well informed in other matters. In the great change from empirical rules to proved constants, from special and experimental knowledge to the application of science [4] in the mechanic arts, we may, however, go too far. The incentives to substitute general for special knowledge are so many, that it may lead us to forget or underrate that part which cannot come within general rules.
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ONE:"Certainly I do. This is a most amazing case. Why, it is copied from the plot of one of my own novels. And, stranger still, that novel has not yet been written!" His utterances on this subject [the existence of an external world] are perhaps chiefly to be found in the third book of his treatise On the Soul, beginning with the fourth chapter. On turning to them we see that he never separates existence from knowledge. A thing in actual existence, he says, is identical with the knowledge of that thing. Again, The possible existence of a thing is identical with the possibility in us of perceiving or knowing it. Thus, until a thing is perceived or known, it can only be said to have a potential or possible existence. And from this a doctrine very similar to that of Ferrier might be deduced, that nothing exists except plus me,that is to say, in relation to some mind perceiving it. (Aristotle, p. 165.)
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TWO:22Isaac Isidore was lunching at his chambers in his own simple way. A hard trying life like his, to say nothing of half his nights spent in society, called for a careful regime. Plain food and a total absence from intoxicants enabled the man to get through an enormous amount of work and pleasure.
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