viscometer into the remarkably precise tool required for the accurate measurement of the properties of steam and other fluids of great industrial importance. This led to his positions as the chief U.S. delegate to and then president of the International Association for the Properties of Steam. He served as one of two coeditors of the ASME Journal of Applied Mechanics for fifteen years, as a member of the Executive Committee and chair of the Applied Mechanics Division of ASME, and as a member of the Peer Committee for Mechanical Engineering of the NAE. He also served on numerous editorial boards, advisory boards, and panels of the Department of Energy, National Science Foundation, National Bureau of Standards, and National Research Council as well as a number of other groups. In recognition of his broad contributions to the field of energy, Professor Kestin received a special citation from the governor of Rhode Island.