MANFREDI, Eustachio, an eminent mathematician and astronomer, was born in 1674 at Bologna in Italy. At first he studied philosophy and jurisprudence, and evinced a strong love for poetry, but latterly he devoted most of his time to mathematics and astronomy. He was appointed mathematical professor in the university of his native city in 1698, and surveyor-general of the rivers and waters in 1704. He was chosen regent of Montalto College during the same year, an office which he resigned in 1711 for that of astronomer to the newly established Institute of Bologna. Manfredi was chosen a foreign member of the
Academy of Sciences at Paris, and of the Royal Society of London. He died of the stone in 1739. The principal of Manfredi's works are,—Ephemerides Motuum Celestium ab anno 1715 ad annum 1750, in 4 vols. 4to; De Transitu Mercurii per solem anno 1723, 4to, Bologna, 1724; and De annuis Inerrantium Stellarum Aberrationibus, 4to, Bologna, 1729.