THREE:Cores expand when heated, and require an allowance in their dimensions the reverse from patterns; this is especially the case when the cores are made upon iron frames. For cylindrical cores less than six inches diameter, or less than two feet long, expansion need not be taken into account by pattern-makers, but for large cores careful calculation is required. The expansion of cores is as the amount of heat imparted to them, and the amount of heat taken up is dependent upon the quantity of metal that may surround the core and its conducting power.It is a familiar fact, first brought to light by Lessing, and generalised by him into a law of all good literary composition, that Homer always throws his descriptions into a narrative form. We are not told what a hero wore, but how he put on his armour; when attention is drawn to a particular object we are made acquainted with its origin and past history; even the reliefs on a shield are invested with life and movement. Homer was not impelled to adopt this method either by conscious reflection or by a profound poetic instinct. At a certain stage of intellectual development, every Greek would find it far easier to arrange the data of experience in successive than in contemporaneous order; the one is fixed, the other admits of indefinite variation. Pictorial and plastic art also begin with serial presentations, and only arrive at the construction of large centralised groups much later on. We have next to observe that, while Greek reflection at first followed the order of time, it turned by preference not to present or future, but to past time. Nothing in Hellenic literature reminds us of Hebrew prophecy. To a Greek all distinct prevision was merged in the gloom of coming death or the glory of anticipated fame. Of course, at every great crisis of the national fortunes much curiosity prevailed among the vulgar as to what course events would take; but it was sedulously discouraged by the noblest minds. Herodotus and46 Sophocles look on even divine predictions as purposely ambiguous and misleading. Pindar often dwells on the hopeless uncertainty of life.35 Thucydides treats all vaticination as utterly delusive. So, when a belief in the souls separate existence first obtained acceptance among the Greeks, it interested them far less as a pledge of never-ending life and progress hereafter, than as involving a possible revelation of past history, of the wondrous adventures which each individual had passed through before assuming his present form. Hence the peculiar force of Pindars congratulation to the partaker in the Eleusinian mysteries; after death he knows not only the end of life, but also its god-given beginning.36 Even the present was not intelligible until it had been projected back into the past, or interpreted by the light of some ancient tale. Sappho, in her famous ode to Aphrodit, recalls the incidents of a former passion precisely similar to the unrequited love which now agitates her heart, and describes at length how the goddess then came to her relief as she is now implored to come again. Modern critics have spoken of this curious literary artifice as a sign of delicacy and reserve. We may be sure that Sappho was an utter stranger to such feelings; she ran her thoughts into a predetermined mould just as a bee builds its wax into hexagonal cells. Curtius, the German historian, has surmised with much plausibility that the entire legend of Troy owes its origin to this habit of throwing back contemporary events into a distant past. According to his view, the characters and scenes recorded by Homer, although unhistorical as they now stand, had really a place in the Achaean colonisation of Asia Minor.37 But, apart from any disguised allusions, old stories had an inexhaustible charm for the Greek imagination. Even during the stirring events of the Peloponnesian war, elderly Athenian47 citizens in their hours of relaxation talked of nothing but mythology.38 When a knowledge of reading became universally diffused, and books could be had at a moderate price, ancient legends seem to have been the favourite literature of the lower classes, just as among ourselves in Caxtons time. Still more must the same taste have prevailed a century earlier. A student who opens Pindars epinician odes for the first time is surprised to find so little about the victorious combatants and the struggles in which they took part, so much about mythical adventures seemingly unconnected with the ostensible subject of the poem. Furthermore, we find that genealogies were the framework by which these distant recollections were held together. Most noble families traced their descent back to a god or to a god-like hero. The entire interval separating the historical period from the heroic age was filled up with more or less fictitious pedigrees. A mans ancestry was much the most important part of his biography. It is likely that Herodotus had just as enthusiastic an admiration as we can have for Leonidas. Yet one fancies that a historian of later date would have shown his appreciation of the Spartan king in a rather different fashion. We should have been told something about the heros personal appearance, and perhaps some characteristic incidents from his earlier career would have been related. Not so with Herodotus. He pauses in the story of Thermopylae to give us the genealogy of Leonidas up to Heracls; no more and no less. That was the highest compliment he could pay, and it is repeated for Pausanias, the victor of Plataea.39 The genealogical method was capable of wide extension, and could be applied to other than human or animal relationships. Hesiods Theogony is a genealogy of heaven and earth, and all that in them is. According to Aeschylus, gain is bred from gain, slaughter from slaughter, woe from woe. Insolence bears a child like unto herself, and this in turn gives birth to48 a still more fatal progeny.40 The same poet terminates his enumeration of the flaming signals that sped the message of victory from Troy to Argos, by describing the last beacon as not ungrandsired by the Idaean fire.41 Now, when the Greek genius had begun to move in any direction, it rushed forward without pausing until arrested by an impassable limit, and then turned back to retraverse at leisure the whole interval separating that limit from its point of departure. Thus, the ascending lines of ancestry were followed up until they led to a common father of all; every series of outrages was traced through successive reprisals back to an initial crime; and more generally every event was affiliated to a preceding event, until the whole chain had been attached to an ultimate self-existing cause. Hence the records of origination, invention, spontaneity were long sought after with an eagerness which threw almost every other interest into the shade. Glory be to the inventor, sings Pindar, in his address to victorious Corinth; whence came the graces of the dithyrambic hymn, who first set the double eagle on the temples of the gods?42 The Prometheus of Aeschylus tells how civilisation began, and the trilogy to which it belongs was probably intended to show how the supremacy of Zeus was first established and secured. A great part of the Agamemnon deals with events long anterior to the opening of the drama, but connected as ultimate causes with the terrible catastrophe which it represents. In the Eumenides we see how the family, as it now exists, was first constituted by the substitution of paternal for maternal headship, and also how the worship of the Avenging Goddesses was first introduced into Athens, as well as how the Areopagite tribunal was founded. It is very probable that Sophocless earliest work, the Triptolemus, represented the origin of agriculture under a dramatic form; and if the same poets later pieces, as well as all those of Euripides,49 stand on quite different ground, occupied as they are with subjects of contemporaneous, or rather of eternal interest, we must regard this as a proof that the whole current of Greek thought had taken a new direction, corresponding to that simultaneously impressed on philosophy by Socrates and the Sophists. We may note further that the Aeginetan sculptures, executed soon after Salamis, though evidently intended to commemorate that victory, represent a conflict waged long before by the tutelary heroes of Aegina against an Asiatic foe. We may also see in our own British Museum how the birth of Athn was recorded in a marble group on one pediment of the Parthenon, and the foundation of her chosen city on the other. The very temple which these majestic sculptures once adorned was a petrified memorial of antiquity, and, by the mere form of its architecture, must have carried back mens thoughts to the earliest Hellenic habitation, the simple structure in which a gabled roof was supported by cross-beams on a row of upright wooden posts.
Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock
