Jean Chappe D'Auterociie, a French astronomer, born at Mauriac, Auvergne, in 1722, died in California, Aug. 1, 1769. He was a priest, but giving his whole attention to astronomy, he became one of the assistants of Cas-sini in delineating the general map of France, and edited the astronomical tables of Dr. Ilalley. In 1700 he was designated by the academy to make an observation of the transit of Venus over the sun's disk, which Halley announced would happen June 6, 1761. He consequently set out for Tobolsk in Siberia, which was pointed out as the most favorable point of observation. His mission was successfully accomplished; and returning to Franco at the end of two years, he published in 1768 his Voyage en Siberie. The following year he sailed for California to observe another transit of Venus, which was to take place June 3. He was equally successful on this occasion, but died soon afterward. The results of his last expedition were published by C. F. Cassini, under the title of Voyage de la Californie.