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
John Davy Rolleston John Davy Rolleston John Davy Rolleston FSA FRCP (25 February 1873 – 13 March 1946) was an English physician and folklorist, who published extensively on infectious diseases and the history of medicine. Overshadowed by his brother, Sir Humphry Rolleston, he established himself as an epidemiologist, gave the Fitzpatrick Lecture at the Royal College of Physicians in 1935-1936 and became involved in numerous other learned societies and medical bodies, including The Royal Society of Medicine and the Society for the Study and Cure of Inebriety. He became the president of three sections of the Royal Society of Medicine, London, including the