JAMES IVORY, the Scottish mathematician who died at Hampstead a hundred years ago on September 21, had the distinction of being among the first to introduce into Great Britain those methods of mathematical analysis which, from the time of Leibniz and the Bernouillis, had been gradually developed on the Continent. The only mathematical appointment he held was that of professor of mathematics at the Royal Military College then housed at Marlow, in Buckinghamshire. This post he held from his thirty-ninth to his fifty-fourth year. The son of a Dundee watchmaker, he was born in 1765, studied for six years at St. Andrews and Edinburgh and was then, in 1786, appointed a teacher in a school at Dundee. In 1789 he abandoned teaching to become partner in a flax mill, and it was on the dissolution of the partnership in 1804 that he came to Marlow. He gained a wide reputation for his mathematical and astronomical papers in the Philosophical Transactions of the Royal Society. He received several medals, including the Copley Medal of the Royal Society, and with several other men of science was knighted in 1831. He was a corresponding member of the Paris Academy of Science.