VAN VLECK, John Monroe, educator, born in Stone Ridge, New York, 4 March, 1833. He was graduated in 1850 at Wesleyan university, where he entered in the junior year, after studying at the University of the city of New York. In 1850 he taught mathematics in the Providence conference seminary, and in the same year he became an assistant in the nautical almanac office in Cambridge, Massachusetts, where he then remained for three years. He was elected adjunct professor of mathematics in 1853 in Wesleyan university, and since 1858 has held the chair of mathematics and astronomy there. In 1872-'3 and 1887-'9 he was acting" president. The degree of LL.D. was conferred on him by Northwestern university in 1876. He was a member of the expedition that was sent out under the auspices of the nautical almanac office to observe the total solar eclipse at Mount Pleasant, Iowa, in 1869. Professor Van Vleck is a member of the international Astronomische Gesellschaft and a fellow of the American association for the advancement of science. His publications include "Tables giving the Positions of the Moon for 1855-'6," and for 1878-'91, and similar " Tables giving the Positions of Saturn for 1857 to 1877," contributed to the "American Nautical Almanac."