Complex sentence: For some time Abate Zantedeschi was professor of physics and philosophy in the Liceo of Venice; later he accepted the chair of physics in the University of Padua, which he held in 1853 being then obliged to resign on account of failing sight.
Split into simpler sentences: For some time Abée Zantedeschi was professor of physics and philosophy in the Liceo of Venice. Later he accepted the chair of physics in the University of Padua, which he held until 1853 being then obliged to resign on account of failing sight.