James Ivory, a Scottish mathematician, born in Dundee in 1765, died near London, Sept 21, 1842. He completed his professional course in theology at the university of St. Andrews in 1786, after which he was a teacher in the academy of Dundee for three years. He was afterward for 15 years superintendent of a flax-spinning factory at Douglastown. Meantime he pursued his mathematical studies, and became known by remarkable memoirs read before the royal society of Edinburgh. In 1804 he was appointed professor of mathematics in the royal military college, then at Harlow, Buckinghamshire. He retired with a pension in 1819, and from that time prosecuted his favorite studies in the vicinity of London. He was a member of the principal learned societies of England and Germany, and in 1831 received an annual pension of £300. His principal writings are papers in the " Transactions " of the royal societies of Edinburgh and London. Three of these were on the attractions of the spheroids, and contained a process of analysis which was acknowledged by Laplace to be superior to his own.