JULES HENRI POINCARE (1854-1912), French physicist ( see 21.892), was born at Nancy April 29 1854, and educated at the lycee in that town. As a boy he served in an ambulance corps during the Franco-Prussian War of 1870, and later passed with distinction through the Ecole Polytechnique in mining, becoming a mining engineer, but soon abandoning practical work for teaching, first at Caen and later in the university of Paris. He won the King of Sweden's open prize for a mathematical treatise in 1889, and in 1908 was elected to the Academie Frangaise. He was a voluminous writer on his own special subjects. Some details of his contributions to science are given in 1 9.8 59, 25.786 and 26.047. He died in Paris July 17 1912.