and offered for sale anonymously) was in fact an alloy of mercury and platinum. For this seemingly astonishing result, he was awarded the Copley Medal. Wollaston, again anonymously, offered a reward to anyone who could confirm Chenevix's claims experimentally. On his part, Chenevix published a second paper supporting his result in 1805, by which time he'd made Paris his permanent home. Henry Cavendish, an admirer of Wollaston, was the sole Society objector in the vote for the publication. Later that year, Wollaston publicly revealed his authorship (although he had communicated as much to the Royal Society before Chenevix's second paper) and details of how he had, correctly, isolated the element palladium. Chenevix bore no apparent animus in later meetings between the two. How damaging the affair was to Chenevix's reputation as a chemist in the scientific world has been a discussion point for different writers. In 1808 came his criticism of Abraham Werner's classification of minerals. In 1809, he produced his final scientific paper, a method to produce acetone by distilling acetates. An English translation of a paper he wrote in 1808 for Annales de Chimie was published in London in 1811 as Observations on Mineralogical Systems. Chenevix was a member of a number of European societies. The Royal Society has (a minimum of) twenty-six papers by Chenevix. Phrenology and mesmerism In November 1807, he attended the Paris lectures of the phrenologists Gall and Spurzheim; and, in 1828, published a review on Gall, Spurzheim, and Phrenology. Spurzheim was so impressed with Chenevix's review that he sought (and was granted) permission to immediately re-print the article as a pamphlet, with 12-page appendix of his (Spurzheim's) own notes. In Paris, in 1816, he met Abbé Faria, who reawakened an interest in animal magnetism that had been dormant since Chenevix's visit to Rotterdam in 1797. In 1828, on a visit to Ireland, he began to practise mesmerism. He wrote extensively of his experiences in a series of papers published in the London Medical and Physical Journal in 1829. Also in 1829, he gave a series of lectures and demonstrations of mesmerism in London that were attended by such eminent medical men as Sir Benjamin Brodie, William Prout, Henry Holland, Henry Earle, and John Elliotson. Works In 1828 he wrote an anonymous review on Gall and Spurzheim's work on phrenology, which was reprinted two years later, with comments by Spurzheim, in London. The Edinburgh