IT is with deep regret that we see the announcement of the death, after a very short illness, of M. Pellat, professor of physics at the Sorbonne (Paris). Joseph Solange Henry Pellat was born at Grenoble on July 27, 1850, and he died on the December 18 last. After leaving the École normale supérieure, he started work as meteorologist in the Paris Observatory. His stay there was not long, however, for he was soon appointed as professor in the Collége Rollin, and then at the Lycée Louis-le-Grand. In 1885 he was appointed a lecturer in the faculty of science at the Sorbonne, and was ultimately given a chair, which was created specially for him. He occupied many distinguished positions. He was for many years general secretary of the French Physical Society, and also occupied the presidential chair. He was vice-president in 1896 of the Societe des Electriciens, and was president of the same society at the time of his death.