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History
John Davy was born the son of Robert Davy, a woodcarver and Grace Millet in Penzance, Cornwall. He attended preparatory schools in Penzance as a child and later assisted his brother, Humphry Davy, in the laboratory of the Royal Institution of Great Britain (RI) in 1808. In 1810 John studied medicine at Edinburgh University gaining his degree in 1814. He experimented on the muriatic theories of his brother in order to help prove them. He entered the British Army Medical Department as a surgeon. He became the Inspector General of Hospitals and it was in this capacity that he travelled over much of the British Empire during his foreign service thus producing several notebooks on his observations of various countries. In 1821 he published An Account of the Interior of Ceylon. In 1830 he married Margaret Fletcher. In 1836 he wrote the Memoirs of the Life of Sir Humphry Davy and he edited the collected works of his brother, producing nine volumes in 1839-1840. He was elected Fellow of the Royal Society in 1834 and published over 100 papers on observations such as the structure of the heart and circulatory system of amphibians; these are listed in the Royal Society Catalogue of Scientific Papers. He lived in the West Indies for a time and returned to the Lake District in the United Kingdom for the remainder of his life. In 1862-1863 he published his Diseases of the Army. Upon his death in 1868, he bequeathed a piece of plate to the Royal Society which had been presented to Sir Humphry Davy by the mine owners for the invention of the safety lamp. His brother had wanted the plate to provide a medal for scientific research.