Humphry Davy to continental Europe alone.) Davy then published his "Elements of Chemical Philosophy, part 1, volume 1", though other parts of this title were never completed. He made notes for a second edition, but it was never required. In October 1813, he and his wife, accompanied by Michael Faraday as his scientific assistant (also treated as a valet), travelled to France to collect the second edition of the "prix du Galvanisme," a medal that Napoleon Bonaparte had awarded Davy for his electro-chemical work. Faraday noted that 'Tis indeed a strange venture at this time, to trust ourselves in a foreign and
Humphry Davy paper for the Royal Society on the element, which is now called iodine. This led to a dispute between Davy and Gay-Lussac on who had the priority on the research. Davy's party did not meet Napoleon in person, but they did visit the Empress Joséphine de Beauharnais at the Château de Malmaison. The party left Paris in December 1813, travelling south to Italy. They sojourned in Florence, where using the burning glass of the Grand Duke of Tuscany in a series of experiments conducted with Faraday's assistance, Davy succeeded in using the sun's rays to ignite diamond, proving it is