society's Philosophical Transactions for 1778, and were later reprinted in the second volume of Hutton's Tracts on Mathematical and Philosophical Subjects. His work on the question procured for him the degree of LL.D. from the University of Edinburgh. He became the foreign secretary of the Royal Society in 1779. His resignation from the society in 1783 was brought about by tensions between its president Sir Joseph Banks and the mathematicians amongst its members. He was elected a Foreign Honorary Member of the American Academy of Arts and Sciences in 1788. While working on the Schiehallion experiment, Hutton recorded 23 Gaelic place-names on or near his measurement contour. Less than half are to be found on the modern Ordnance Survey map. After his Tables of the Products and Powers of Numbers, 1781, and his Mathematical Tables of 1785 (second edition 1794), Hutton issued, for the use of the Royal Military Academy, in 1787 Elements of Conic Sections, and in 1798 his Course of Mathematics. His Mathematical and Philosophical Dictionary, a valuable contribution to scientific biography, was published in 1795 and the four volumes of Recreations in Mathematics and Natural Philosophy, mostly translated from the French, in 1803. One of his most laborious works was the abridgment, in conjunction with G. Shaw and R. Pearson, of the Royal Society's Philosophical Transactions. This undertaking, the mathematical and scientific parts of which fell to Hutton, was completed in 1809, and filled 18 quarto volumes. From 1764 he contributed to The Ladies' Diary (a poetical and mathematical almanac established in 1704), and became its editor in 1773–4, retaining the post until 1817. He had previously begun a small periodical called Miscellane Mathematica, of which only 13 numbers appeared; he subsequently published five volumes of The Diarian Miscellany which contained substantial extracts from the Diary. Due to ill health, Hutton resigned his professorship in 1807, although he served as the principal examiner of the Royal Military Academy, and also to the Addiscombe Military Seminary for some years after his retirement. The Board of Ordnance had granted him a pension of £500 a year. During his last years, he worked on new editions of his earlier works. He died on 27 January 1823, and was buried in the family vault at Charlton, in Kent. During the last year of his life a group of his friends set up a fund to pay to have a marble bust