the university laboratory, Osborn Memorial Laboratory, and served as its director beginning in 1918. In 1914, Harrison was the Medical School's chief advisor on staffing. He was made the Sterling Professor of Biology in 1927 and kept these three titles until his retirement in 1938, when he was made Yale's Professor Emeritus. Other pursuits Harrison pursued many things outside of his work in university. From 1904 to 1946, Harrison was the managing editor of the Journal of Experimental Zoology. He served in the American Society of Anatomists from 1912 to 1914, and joined the American Society of Naturalists in 1913. In 1924, Harrison joined the American Society of Zoologists and in 1933, he joined the Beaumont Medical Club. He was a member of Anatomische Gesellschaft ("Anatomical Society" in German) from 1934 to 1935 and became chair of section F for the American Association for Advancement of Science in 1936. After his retirement from Yale, he was called upon several times as an advisor to the U.S. government and his organisational skills were of paramount importance in establishing links between scientists, the government, and the media. He was Chairman of the National Research Council from 1938 to 1946 and worked to help people with difficulties obtaining medicines such as penicillin. He was a member of the Science Committee of the National Resources Planning Board in 1938, and chairman of the Committee on Civil Service Improvement and a member of the Sixth Pacific Science Congress in 1939. He was awarded many prizes, such as the John Scott Medal and Premium of the City of Philadelphia in 1925 and the John J. Carty Medal of the National Academy of Sciences in 1947. He also served on the board of trustees for Science Service, now known as Society for Science & the Public, from 1938 to 1956. From 1946 to 1947, Harrison was a member of the Society for the Study of Development and Growth. Harrison gave a Croonian Lecture in 1933: The origin and development of the nervous system studied by the methods of experimental embryology. He was elected a Foreign Member of the Royal Society in 1940. He gave the 1948-49 Silliman Memorial Lecture: Organization and Development of the Embryo, published posthumously in 1969. Studies in embryology Harrison successfully cultured frog neuroblasts in a lymph medium, proving that nerve fibers develop without a preexisting bridge or chain and that tissues can be