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THREE:Civil engineering, in the meaning assumed for the term, has become almost a pure mathematical science. Constants are proved and established for nearly every computation; the strength and durability of materials, from long and repeated tests, has come to be well understood; and as in the case of machine tools, the uniformity of practice among civil engineers, and the perfection of their works, attest how far civil engineering has become a true science, and proves that the principles involved in the construction of permanent works are well understood.A machine may be mechanically correct, arranged with symmetry, true proportions, and proper movements; but if such a machine has not commercial value, and is not applicable to a useful purpose, it is as much a failure as though it were mechanically inoperative. In fact, this consideration of cost and commercial value must be continually present; and a mechanical education that has not furnished a true understanding of the relations between commercial cost and mechanical excellence will fall short of achieving the objects for which such an education is undertaken. By reasoning from such premises as have been laid down, an apprentice may form true standards by which to judge of plans and processes that he is brought in contact with, and the objects for which they are conducted.

FORE:In the streets and in the caf��s I saw a great many marines who had taken part in the fights near Antwerp and were sent to Brussels for a few days' rest. It was remarkable that so many of them who had only lately looked death in the face, thought that they could not amuse themselves better than by mixing with girls of the worst description. Although I cannot, of course, always believe what soldiers, fresh back from a fight, assert in their over-excited condition, I assumed that I might conclude that things went badly with the defence of Antwerp.We cannot, then, agree with Zeller, when he groups the292 Neo-Platonists together with the other post-Aristotelian schools, on the ground that they are all alike distinguished from Plato and Aristotle by the exclusive attention which they pay to subjective and practical, as opposed to scientific and theoretical interests. It seems to us that such distinctions are out of relation to the historical order in which the different systems of Greek philosophy were evolved. It is not in the substance of their teaching, but in their diminished power of original speculation, that the thinkers who came after Aristotle offer the strongest contrast to their predecessors. In so far as they are exclusively practical and subjective, they follow the Humanists and Socrates. In so far as they combine Socratic tendencies with physical studies, they imitate the method of Plato and Aristotle. Their cosmopolitan naturalism is inherited from the Cynics in the first instance, more remotely from the physiocratic Sophists, and, perhaps, in the last resort, from Heracleitus. Their religion is traceable either to Pythagoras, to Socrates, or to Plato. Their scepticism is only a little more developed than that of Protagoras and the Cyrenaics. But if we seek for some one principle held in common by all these later schools, and held by none of the earlier schools, we shall seek for it in vain. The imitative systems are separated from one another by the same fundamental differences as those which divide the original systems. Now, in both periods, the deepest of all differences is that which divides the spiritualists from the materialists. In both periods, also, it is materialism that comes first. And in both, the transition from one doctrine to the other is marked by the exclusive prominence given to subjective, practical, sceptical, or theological interests in philosophy; by the enthusiastic culture of rhetoric in general education; and by a strong religious reaction in the upper ranks of society. FORE: