Complex sentence: Richard Norris, a doctor of medicine and professor of physiology at Queen's College, Birmingham, is generally credited with the first development of dry collodion plate in the 1860's, in 1894 he took out a new patent for dry plate used in photography.
Split into simpler sentences: Richard Norris, a doctor of medicine and professor of physiology at Queen's College, Birmingham, is generally credited with the first development of dry collodion plate in the 1860's. In 1894 he took out a new patent for dry plate used in photography.