sentences:  In 1870 Liversidge became a demonstrator of chemistry at the university laboratory.In 1872 Liversidge accepted the appointment of 'Reader in Geology and Assistant in the Laboratory' at the University of Sydney and began his duties there early in 1873.Liversidge became professor of geology and mineralogy in 1874, and in 1876 he published "The Minerals of New South Wales", being a reprint of a paper read at the Royal Society of New South Wales in December 1874.