Professor Donald H. Napper is a world leader in polymer colloids research, particularly in the areas of steric stabilization and the kinetics of emulsion polymerization. His monograph "Polymeric Stabilization" (1983), which describes how polymers confer stability on a colloidal dispersion, places Napper's own extensive and definitive studies in the context of other work. His status as a leader in polymer science at both the national and international levels rests on the solid foundation of his research work but has been enhanced by his untiring readiness and skill in communicating his knowledge to students and fellow researchers alike.