hydatid parasite was accepted by the University of Sydney for the degree of Doctor of Veterinary Science. Work at the McMaster Laboratory on the control of sheep liver-fluke, made a significant improvement to animal health and the returns from agriculture in the 1930s. Science administration Following his time at the McMaster Laboratory, Clunies Ross spent times in Asia, and he was the Australian representative at the International Wool Secretariat in London from 1937 to 1940. He enjoyed this administrative role. He also served as a member of Australia's Delegation to the League of Nations Assembly in 1938. He and his family returned to Australia when World War II broke out, he returned to the Veterinary school at the University of Sydney. He was president of the Australian Institute of International Affairs from 1941 to 1945. He was a notable member of the Australian Veterinary Association. He was a vocal commentator on international affairs throughout the remainder of his career. CSIRO In 1943, Clunies Ross was appointed Director of Scientific Personnel in the Commonwealth Directorate of Manpower and also Adviser on the Pastoral Industry to the Department of War Organization of Industry. He held these positions until 1945 while continuing work connected with his university position. At the end of the war he left the university to assist the CSIR in planning sheep and wool-textile research. In 1946 he was appointed a full-time member of the CSIR Executive Committee, which was situated in Melbourne. He served as the executive officer of the CSIR until 1949 when it was renamed the CSIRO. He was chairman of the CSIRO until his death in 1959. During this time he oversaw the release of myxomatosis for rabbit control in Australia. In his retirement he was president of the Melbourne Wallaby Club 1954 – 1955. While in his role at the CSIRO Clunies Ross came into conflict with pioneering radio astronomer Ruby Payne-Scott over the role of women in the organization, and her role in particular. The two met in person to discuss the disparity in pay and working conditions between male and female employees of CSIRO, but this did not result in change to the status quo. When Payne-Scott's marriage and pregnancy were revealed, the two had a hostile exchange of letters, and CSIRO consequently deprived her permanent employee status and pension funds. Later years and legacy In 1954, Clunies Ross was knighted and appointed