THREE:A true movement of carriages is dependent upon the amount or wearing power of their bearing surface, how this surface is disposed in reference to the strain to be resisted, and the conditions under which the sliding surfaces move; that is, how kept in contact. The cutting strain which is to be mainly considered, falls usually at an angle of thirty to forty degrees downward toward the front, from the centre of the lathe. To resist such strain a flat top shear presents no surface at right angles to the strain; the bearings are all oblique, and not only this, but all horizontal strain falls on one side of the shear only; for this reason, flat top shears have to be made much heavier than would be required if the sum of their cross section could be employed to resist transverse strain. This difficulty can, however, be mainly obviated by numerous cross girts, which will be found in most lathe frames having flat tops.
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THREE:
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THREE:Such, so far as they can be ascertained, are the most important facts in the life of Plotinus. Interwoven with these, we find some legendary details which vividly illustrate the superstition and credulity of the age. It is evident from his childish talk about the numbers six and nine that Porphyry was imbued with Pythagorean ideas. Accordingly, his whole account of Plotinus is dominated by the wish to represent that philosopher under the guise of a Pythagorean saint. We have already alluded to the manner in which he exalts his heros remarkable sagacity into a power of supernatural prescience and divination. He also tells us, with the most unsuspecting good faith, how a certain Alexandrian philosopher whose jealousy had been excited by the success of his illustrious countryman, endeavoured to draw down the malignant influences of the stars on the head of Plotinus, but was obliged to desist on finding that the attack recoiled on himself.421 On another occasion, an Egyptian priest, by way of exhibiting his skill in magic, offered to conjure up the daemon or guardian spirit of Plotinus. The latter readily consented, and the Temple of Isis was chosen for the scene of the operations, as, according to the Egyptian, no other spot sufficiently pure for the purpose could be found in Rome. The incantations were duly pronounced, when, much to the admiration of those present, a god made his appearance instead of the expected daemon. By what particular marks the divinity of the apparition was determined, Porphyry omits to mention. The philosopher was congratulated by his countryman on the possession of such a distinguished patron, but the celestial visitor vanished before any questions could be put to him. This mishap was attributed to a friend281 who, either from envy or fear, choked the birds which had been given him to hold, and which seem to have played a very important part in the incantation, though what it was, we do not find more particularly specified.422
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
