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In respect to books and reading, the apprentice should supply himself with references. A single book, and the best one that can be obtained on each of the different branches of engineering, is [13] enough to begin with. A pocket-book for reference, such as Molesworth's or Nystrom's, is of use, and should always be at hand. For general reading, nothing compares with the scientific and technical journals, which are now so replete with all kinds of information. Beside noting the present progress of engineering industry in all parts of the world, they contain nearly all besides that a learner will require. このページの先頭です
ONE:Machines with direct action, such as punches, shears, or rolls, require first a train of mechanism of some kind to reduce the motion from the driving power so as to attain force; and secondly, [105] this force must be balanced or resisted by strong framing, shafts, and bearings. A punching-machine, for example, must have framing strong enough to resist a thrust equal to the force applied to the work; hence the frames of such machines are always a huge mass, disposed in the most advantageous way to meet and resist this reactive force, while the main details of a drop-machine capable of exerting an equal force consist only of a block and a pair of guides to direct its course.
TWO:Leona said nothing. There was a queer, strained look, half of admiration, on her face. But she uttered no protest, no denial.
THREE:
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THREE:Nor did Socrates only consider the whole conception in relation to its parts, he also grouped conceptions together according to their genera and founded logical classification. To appreciate the bearing of this idea on human interests it will be enough to study the disposition of a code. We shall147 then see how much more easy it becomes to bring individual cases under a general rule, and to retain the whole body of rules in our memory, when we can pass step by step from the most universal to the most particular categories. Now, it was by jurists versed in the Stoic philosophy that Roman law was codified, and it was by Stoicism that the traditions of Socratic philosophy were most faithfully preserved.