which they returned home to London. He was invited again by the University of California at Berkeley to lecture in 1932, an occasion that the Singers used to circle the globe going westward, spending about sixteen months away from England. On their return, Singer resumed his post at UCL, where he remained until his retirement in 1942. His last great publication before retirement was A Short History of Scientific Ideas to 1900. Singer was one of the two contributors to the revised and updated version for Encyclopædia Britannica of the bulk of Thomas Clifford Allbutt's article Medicine which had been in the 11th edition. As revised for the 14th edition Singer's part was Medicine, History of (in volume 15), which followed after Sir Humphry Rolleston's Medicine, General. Retirement was not idle for the Singers. Charles continued research into various topics and published several noteworthy books, including editing the monumental A History of Technology, which was released in five volumes between 1954 and 1958, Galen on Anatomical Procedures, and A History of Biology. Numerous articles were also published in this period, some of which remain important. He died in Par, Cornwall. Award and recognitions Charles Singer's life was complemented by numerous awards, honors, and positions of leadership. Among these were an honorary degree (D.Sc.) from Oxford, and terms of presidency of several societies, including the British Society for the History of Science (1946–1948) and the International Union for the History of Science (1947). He was also a member of the International Society for the History of Medicine. He and his wife were co-awarded the Sarton Medal from the History of Science Society in 1956. He was elected an International Member of the American Philosophical Society in 1958. Partial bibliography Studies in the history and method of science (1917) Greek Biology and Greek Medicine, Chapters in the History of Science, Oxford: Clarendon Press, 1922. From Magic to Science: Essays on the Scientific Twilight (1928) A Short History of Medicine. New York: Oxford University Press, 1928. A Short History of Science to the Nineteenth Century (1941) As editor, A History of Technology (5 vols, between 1954 and 1958), together with Eric John Holmyard and A. R. Hall. Galen on Anatomical Procedures (1956) A History of Biology to About the Year 1900 (1959) Notes References Melvin Kranzberg, Charles Singer and "A History of Technology". Vol. 1, No. 4, Review Issue: A History of Technology