Dondi, Giovanni( Italian astronomer, astrologer and physician.)
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Biography Dondi, Giovanni
(Dondi Dall 'Orologio; Dondi, Dondi dall'Orologio)
. (1318, Chioggia, Italy - 22.06.1389, Milan)
. Son of a municipal doctor in Chioggia de'Dondi Jacopo, who also studied astronomy and astrology (Jacopo attributed to two rules of rectification of birth chart of an hour of conception and astronomical essay "Planetarium")
. After moving in 1349, Mr.. in Padua, D. became a doctor of Emperor Charles IV. In 1350 or 1352 g. He was appointed professor of astronomy at the University of Padua, and then became a member of all four faculties (astrology, medicine, philosophy and logic). D. also worked at the universities of Florence and Pavia. D. acquired great fame for the development of astrological clock, which he himself invented and designed over 16 years, having completed work in 1364, Mr.. Have reached our days admiring assessment of his contemporaries (in particular, Petrarch), who gave the achievements of Dr.. in astronomy. D. detailed description of its planetary hours in the book "Tractatus astrarii" ( "Tractatus planetarii"). These hours, in addition, they showed 24 hours, allowed to determine public holidays, the provisions of all the planets septenera, the Lunar nodes, as well as the time of sunrise and sunset. D. also wrote a work on the hot springs near Padua, which gave his opinion that the causes of underground vapors sorts is the impact of celestial rays and in the occult influences of stars.