Hippace

[Lat.] Cheese made of mare's milk. The rennet of a colt. Hipparch i a, n . (Zool.) See SATYRIDE. Hipparch us, the most eminent among the ancient astronomers, was a native of Nicæ, in Bithynia, and flourished about a century and a half before the Christian æra. He resided some time in the island of Rhodes, whence he has derived the appellation of Rhodius ; but he afterwards went to Alexandria, at that time the great school of science. He has been styled the patriarch of astronomy, and was certainly the first who treated the sublime science in a philosophic manner. He discov ered the prece ion of the equinoxes, calculated the eclipses, determined the revolutions and mean motions of the planets, invented the stereographic method of projection, numbered and catalogued the fixed stars, and, in short, by his labors were laid the solid foundations of geographical and trigonometrical science. Hipped-roof, (hipt-roof.) n. ( Arch .) See HIP-ROOP. Hip perholme, a town of England, in the West Riding of Yorkshire, 21⁄2 m. from Halifax. Hip'pias, prince of Athens, was the son of Pis i stratus, at whose death he a umed the government, in conjunction with his brother Hipparch us; but the latter being a a inated by a band of conspirators, while conducting a solemn proce ion to the temple of Minerva, H. immediately seized the reins of govern in ent, and revenged the death of his brother by putting to death all of whom he entertained the least suspicion. His tyranny at last became so obnoxious to the citizens, that he was expelled from the city B. c. 510. He afterwards found means to induce Darius to apply to the A then i ans in his favor; and their decisive refusal kindled the first war of the Persians against the European Greeks. According to some authorities the fate of Hippias was decided on the field of Marathon, where he fell on that memorable day, fighting against his countrymen, B. c. 490. Hippocampi, (MAJOR and MINOR.) [Lat. pl . of hippo campus .] ( Anat .) The large and small sea-horse, - the name of two proce es in the ventricles of the brain, so called from their fanciful resemblance to the hippocampus.