This distinguished series contains the biographies of deceased members of the National Academy of Sciences and bibliographies of their published works. Each biographical essay was written by a member of the Academy familiar with the professional career of the deceased. A cumulative index for all 57 volumes is now included. For historical and bibliographical purposes, these volumes are worth returning to time and again. Volume 57 includes biographies of: Arthur Francis Buddington, J. George Harrar, Paul Herget, John Dove Isaacs III, Bessel Kok, Otto Krayer, Rebecca Craighill Lancefield, Harold Dwight Lasswell, Jay Laurence Lush, John Howard Mueller, Robert Franklin Pitts, John Robert Raper, Karl Sax, Gerhard Schmidt, Leslie Spier, Hans-Lukas Teuber, and Warren Weaver.