This report summarizes activities performed during and after World War II at Oak Ridge National Laboratory and Iowa State University aimed at the separation of rare earths by ion-exchange chromatography on laboratory, pilot-plant, and industrial scales.

Leslie S. Ettre, editor of "Milestones in Chromatography," has been part of the chromatography industry for over 50 years, and is one of the most respected figures in the field. He was with perkinElmer Corp., Shelton, Connecticut, for over 30 years, and is currently a member of LCGC's editorial advisory board.

Preparative Liquid Chromatography and the Manhattan Project