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THREE: FORE:Chemistry also received valuable extensions of its field. Dr. John Mayow published new facts respecting nitre, and on the phenomena of respiration and combustion, as revealed by experiments on this and other substances. At the commencement of the eighteenth century Stahl, a German chemist, propounded his theory of phlogiston as the principle of combustion, which was only exploded by the further discoveries of Dr. Black, Cavendish, and Priestley. Soon after, Dr. Hales threw new light on a?riform bodies, or, as they are now termed, gases; and finally, Dr. Black demonstrated the presence of a gas in magnesia, lime, and the alkalies, which had long before been noticed by Van Helmont, but had been forgotten. This was then termed fixed air, but has now acquired the name of carbonic acid gas, or carbon dioxide. At the end of this period chemistry was extensively studied, and was rapidly revealing its secrets.

THREE:"Sounds rather like a family magazine novel hero, doesn't it?" Landor said, with a hint of a sneer, then repented, and added that Cairness had been with him as guide, and was really a fine fellow. He turned his eyes slowly, without moving, and looked at Felipa. She was sitting near them in a patch of sun-sifted shade behind the madeira vines, sewing on a pinafore for the little girl who was just then, with her brother, crossing the parade to the post school, as school call sounded. He knew well enough that she must have heard, her ears were so preternaturally sharp. But the only sign she gave was that her lips had set a little. So he waited in considerable uneasiness for what might happen. He understood her no more than he had that first day he had met her riding with the troops from Kansas, when her indifferent manner had chilled him, and it was perhaps because he insisted upon working his reasoning from the basis that her character was complicated, whereas it was absolutely simple. He met constantly with her with much the same sort of mental sensation that one has physically, where one takes a step in the dark, expecting a fall in the ground, and comes down upon a level. The jar always bewildered him. He was never sure what she would do next, though she had never yet, save once, done anything flagrantly unwise. He dreaded, however, the moment when she might chance to meet Cairness face to face. FORE:

THREE:It is said that Sir Robert had, some time before, addressed a letter to the Pretender with the object of softening the asperity of his partisans in England, and that this had so raised the hopes of James, that Walpole was actually intending to come round, that he had ordered his followers to avoid anything which should shake his power. Whatever the cause, the fact was striking, and the Opposition having concluded its onslaught upon him, he rose to make his reply. It was an occasion which demanded the utmost exertion of his powers, and he put them forth. Walpole's speech on this day has justly been deemed his masterpiece. It was four o'clock in the morning when he concluded his masterly defence, and the motion was instantly rejected by two hundred and ninety votes against one hundred and six. The immediate effect of the attack appeared to be to strengthen the Minister, and that considerably; his lev��e the next morning was more crowded than had ever been known, and he seemed to sway the Cabinet with uncontrolled power. But thinking men predicted that the blow would tell in the end, when the momentary enthusiasm had gone off; and Walpole himself seemed to be of the same opinion. The attack, in truth, was but the first outbreak of the storm which, kept up by the implacable spirit of a powerful Opposition, was sure to bear him down at last. FORE:Plotinus is not only the greatest and most celebrated of the Neo-Platonists, he is also the first respecting whose opinions we have any authentic information, and therefore the one who for all practical purposes must be regarded as the founder of the school. What we know about his life is derived from a biography written by his disciple Porphyry. This is a rather foolish performance; but it possesses considerable interest, both on account of the information which it was intended to supply, and also as affording indirect evidence of the height to which superstition had risen during the third century of our era. Plotinus gave his friends to understand that he was born in Egypt about 205 A.D.; but so reluctant was he to mention any circumstance connected with his physical existence, that his race and parentage always remained a mystery. He showed somewhat more communicativeness in speaking of his274 mental history, and used to relate in after-life that at the age of twenty-eight he had felt strongly attracted to the study of philosophy, but remained utterly dissatisfied with what the most famous teachers of Alexandria had to tell him on the subject. At last he found in Ammonius Saccas the ideal sage for whom he had been seeking, and continued to attend his lectures for eleven years. At the end of that period, he joined an eastern expedition under the Emperor Gordian, for the purpose of making himself acquainted with the wisdom of the Persians and Indians, concerning which his curiosity seems to have been excited by Ammonius. But his hopes of further enlightenment in that quarter were not fulfilled. The campaign terminated disastrously; the emperor himself fell at the head of his troops in Mesopotamia, and Plotinus had great difficulty in escaping with his life to Antioch. Soon afterwards he settled in Rome, and remained there until near the end of his life, when ill-health obliged him to retire to a country seat in Campania, the property of a deceased friend, Z��thus. Here the philosopher died, in the sixty-sixth year of his age.