Betty Jo Teeter Dobbs (October 19, 1930 - March 29, 1994) was a historian specializing in Isaac Newton's occult studies. Her works include The Foundations of Newtons Alchemy, or the Hunting of the Green Lyon, Alchemical Death and Resurrection, and The Janus Faces of Genius: The Role of Alchemy in Newton's Thought. She was a professor of history at the University of California, Davis from 1991-1994. In 1997 she was awarded posthumously with the George Sarton Medal of the History of Science Society. Margaret C. Jacob is Distinguished Professor of History at the University of California, Los Angeles. She is author of many books, including The Enlightenment: A Brief History with Selected Texts, Scientific Culture and the Making of the Industrial West, The Politics of Western Science 1640-1990, Newton and the Culture of Newtonianism (with Betty Jo Teeter Dobbs), Origins of Anglo-American Radicalism, and, most recently, The Origins of Freemasonry: Facts and Fictions.