We Possess Little Information Respecting His Ideas Of The Form Of The Earth, Or The Relative Position Or Extent Of The Different Quarters And Countries On The Surface Of The Globe.

He seems to have been the first who conceived the idea of a southern continent, uniting Africa and India:

He had evidently some information, though very vague and erroneous, of India, beyond the Ganges. On the east coast of Africa, his knowledge did not extend beyond Cape Guardaferi. On the whole, geography is more indebted to him for his discoveries in astronomy, and, above all, for his setting the example of carefully ascertaining facts, and not indulging, so much as his predecessors had done, in conjectures and hypotheses, than for any actual discoveries or advances he made in it. The eulogium which Pliny has pronounced on him is very eloquent, and fully deserved. "Hipparchus can scarcely receive too high praise: he has proved, more satisfactorily than any other philosopher, that man is allied to heaven, and his soul derived from on high. In his time, more than one new star was discovered, or rather appeared for the first time; and this induced him to believe, that future ages might witness stars for the first time moving from the immense regions of space, within the limits of our observation. But the grandeur and boldness of Hipparchus's mind rested not here: he attempted, and in some measure succeeded in doing, what seems above human knowledge and power: he numbered the stars, laid down rules by which their rising and setting might be ascertained beforehand; and, finally, he constructed an apparatus on which the position of each star was accurately given, and a miniature picture of the heavens, with the motions of the celestial bodies, their rising and setting, increase and diminution. He thus may be said to have left the heavens as a legacy to that man, if any such were to be found, who could rival him and follow his steps."

From the time of Hipparchus to that of Ptolemy the geographer, the Alexandrian school, though rich in philosophers, who devoted their studies and labour to other branches of physical and metaphysical science, did not produce one, who improved geography, or the sciences on which it depends, with the exception of Posidonius. This philosopher, who belonged to the sect of the Stoics, was born at Apamea in Syria: he usually resided at Rhodes, and was the friend of Pompey and Cicero. The former, on his return from Syria, came thither to attend his lectures. Arriving at his house, he forbad his lictor to knock, as was usual, at the door; and paid homage to philosophy, by lowering the fasces at the abode of Posidonius. Pompey, being informed that he was at that time ill of the gout, visited him in his confinement, and expressed himself very much disappointed that he could not have the benefit of his lectures. Posidonius, thus honoured and flattered, in spite of his pain, delivered a lecture in the presence of his noble visitor; the subject of which was to prove, that nothing is good which is not honourable.

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