Patrick Maynard Stuart Blackett, Baron Blackett of Chelsea, was a British experimental physicist and life peer who received the 1948 Nobel Prize in Physics. In 1925, he was the first person to prove that radioactivity could cause the nuclear transmutation of one chemical element to another. He also made major contributions to the Allied war effort in World War II, advising on military strategy and developing operational research. The Nobel Prize in Physics 1948, announced November 4, 1948. Patrick M.S. Blackett, “for his development of the Wilson cloud chamber method, and his discoveries therewith in the fields of nuclear physics and cosmic radiation”. Patrick M.S. Blackett: born 1897, London, United Kingdom. Wiki link Data: the Nobel Foundation (CC0).