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
Royal Institution Perutz, John Kendrew, Antony Hewish, and George Porter. In the 19th century, Faraday carried out much of the research which laid the groundwork for the practical exploitation of electricity at the Royal Institution. In total fifteen scientists attached to the Royal Institution have won Nobel Prizes. Ten chemical elements including sodium were discovered there; the electric generator was devised at the Institution, and much of the early work on the atomic structure of crystals was carried out within it. Since 1799, the Royal Institution has had fifteen presidents and one acting president. The leadership of the Royal Institution has had