ONE:Irregularity of cooling may be the result of unequal conducting power in different parts of a mould or cores, or it may be [98] from the varying dimensions of the castings, which contain heat as their thickness, and give it off in the same ratio. As a rule, the drag or bottom side of a casting cools first, especially if a mould rests on the ground, and there is not much sand between the castings and the earth; this is a common cause of unequal cooling, especially in large flat pieces. Air being a bad conductor of heat, and the sand usually thin on the cope or top side, the result is that the top of moulds remain quite hot, while at the bottom the earth, being a good conductor, carries off the heat and cools that side first, so that the iron 'sets' first on the bottom, afterwards cooling and contracting on the top, so that castings are warped and left with inherent strains.It was natural that one who united a great intellect to a glowing temperament should turn his thoughts to poetry. Plato wrote a quantity of verses��verse-making had become fashionable just then��but wisely committed them to the flames on making the acquaintance of Socrates. It may well be doubted whether the author of the Phaedrus and the Symposium would ever have attained eminence in metrical composition, even had he lived in an age far more favourable to poetic inspiration than that which came after the flowering time of Attic art. It seems as if Plato, with all his fervour, fancy, and dramatic skill, lacked the most essential quality of a singer; his finest passages are on a level with the highest poetry, and yet they are separated from it by a chasm more easily felt than described. Aristotle, whom we think of as hard and dry and cold, sometimes comes much nearer to the true lyric cry. And, as if to mark out Plato��s style still more distinctly from every other, it is also deficient in oratorical power. The philosopher evidently thought that he could beat the rhetoricians on their own ground; if the Menexenus be genuine, he tried to do so and failed; and even without its191 testimony we are entitled to say as much on the strength of shorter attempts. We must even take leave to doubt whether dialogue, properly so called, was Plato��s forte. Where one speaker is placed at such a height above the others as Socrates, or the Eleatic Stranger, or the Athenian in the Laws, there cannot be any real conversation. The other interlocutors are good listeners, and serve to break the monotony of a continuous exposition by their expressions of assent or even by their occasional inability to follow the argument, but give no real help or stimulus. And when allowed to offer an opinion of their own, they, too, lapse into a monologue, addressed, as our silent trains of thought habitually are, to an imaginary auditor whose sympathy and support are necessary but are also secure. Yet if Plato��s style is neither exactly poetical, nor oratorical, nor conversational, it has affinities with each of these three varieties; it represents the common root from which they spring, and brings us, better than any other species of composition, into immediate contact with the mind of the writer. The Platonic Socrates has eyes like those of a portrait which follow us wherever we turn, and through which we can read his inmost soul, which is no other than the universal reason of humanity in the delighted surprise of its first awakening to self-conscious activity. The poet thinks and feels for us; the orator makes our thoughts and feelings his own, and then restores them to us in a concentrated form, ��receiving in vapour what he gives back in a flood.�� Plato removes every obstacle to the free development of our faculties; he teaches us by his own example how to think and to feel for ourselves. If Socrates personified philosophy, Plato has reproduced the personification in artistic form with such masterly effect that its influence has been extended through all ages and over the whole civilised world. This portrait stands as an intermediary between its original and the far-reaching effects indirectly due to his dialectic inspiration, like that universal soul which Plato himself has placed between192 the supreme artificer and the material world, that it might bring the fleeting contents of space and time into harmony with uncreated and everlasting ideas.

ONE:Even as regards physical phenomena, Socrates, so far from professing complete ignorance, held a very positive theory which he was quite ready to share with his friends. He taught what is called the doctrine of final causes; and, so far as our knowledge goes, he was either the first to teach it, or, at any rate, the first to prove the existence of divine agencies by its means. The old poets had occasionally attributed the origin of man and other animals to supernatural intelligence, but, apparently, without being led to their conviction by any evidence of design displayed in the structure of organised creatures. Socrates, on the other hand, went through the various external organs of the human body with great minuteness, and showed, to his own satisfaction, that they evinced the workings of a wise and beneficent Artist. We shall have more to say further on about this whole argument; here we only wish to observe that, intrinsically, it does not differ very much from the speculations which its author derided as the fruit of an impertinent curiosity; and that no one who now employed it would, for a single moment, be called an agnostic or a sceptic.

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