DAVID GROSH THOMPSON was born in Lockland, Ohio, May 12, 1888, and died in his home in Washington, D.C., February 19, 1943. At the age of four his family moved to Evanston, Illinois, where his father was the editor of the Northwestern Christian Advocate. Mr. Thompson was graduated from Northwestern University in 1911, received a Master's degree from the University of Illinois in 1913, and also took graduate work in Chicago and Johns Hopkins universities. He served on the geological surveys of Illinois and Maryland, and was an instructor in Lehigh University and Goucher College. From 1917 until his death he served in the Ground‐Water Division of the United States Geological Survey. In 1922 he was married to Frances E. Goodrich. He is Survived by her and by their two sons, David Goodrich and Clifford Francis. He was a fellow of the American Association for the Advancement of Science and the Geological Society of America, and a member of the American Geophysical Union, Society of Economic Geologists, Geological Society of Washington, Washington Academy of Sciences, American Water Works ASSOCiation, and Delta Tau Delta fraternit