Royal Institution frozen, he was not allowed to practise as a doctor, and Humphry Davy was appointed as his assistant, so he resigned. Humphry Davy was an even greater success, as was his assistant and successor Michael Faraday. Davy's immediate successor was William Thomas Brande. Thus the Institution has had an instrumental role in the advancement of science since its founding. Notable scientists who have worked there include Sir Humphry Davy (who discovered sodium and potassium), Michael Faraday, James Dewar, Sir William Henry Bragg and Sir William Lawrence Bragg (who jointly won the Nobel prize for their work on x-ray diffraction), Max
Andrew Humphrey Air Staff on 1 April 1974. As Chief of the Air Staff he advised the new Labour Government on the implementation of their latest Defence Review. Following promotion to Marshal of the Royal Air Force on 6 August 1976, Humphrey was appointed Chief of the Defence Staff on 24 October 1976. However he only served in that role for only three months before catching pneumonia following a visit to British forces in Norway during a particularly cold Winter. He died in the RAF Hospital at Halton on 24 January 1977. In March 1952 Humphrey married Agnes Stevenson Wright; there were