Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Patrick Maynard Stuart Blackett, Baron Blackett OM CH FRS (18 November 1897 13 July 1974) was an English experimental physicist known for his work on cloud chambers, cosmic rays, and paleomagnetism. He also made a major contribution in World War II advising on military strategy and developing Operational Research. His left-wing views saw an outlet in third world development and in influencing policy in the Labour Government of the 1960s.