Dr. A.E. Hamielec is noted for significant contributions to the application of transport theory to process metallurgy and cloud physics, for the establishment of gel permeation chromatography as a routine tool for polymer characterization, for the development of widely-accepted polymerization models, and for service to the chemical industry as a consultant and professional educator.

A young Canadian mathematican of international reputation who has made important contributions to algebra and analysis. Having started with abstract ring theory, he turned his attention to von Neumann regular rings and C*-algebras, becoming the leading expert in dimension groups and displaying a mastery of K-theory and its applications. He solved three open problems posed by eminent mathematicians by methods both sophisticated and ingenious; Kaplansky's 1951 question on the equivalence of left and right projections in finite C*-algebras, the 1960 classification problem of approximately finite C*-algebras and a question by Bass in 1963 concerning the propinquity of Gorenstien rings.

John Hardy, who as a student was one of the first to exploit the experimental and theoretical opportunities presented by the discovery of delayed proton emission, has become one of Canada's best nuclear physicists as recognized by his winning recently the Herzberg Medal of the Canadian Association of Physicists. Equally at home in theory and experiment, he has introduced techniques of unusual precision as part of a broad program studying nuclei far from stability, a field crucial to our further understanding of the nucleus. One important result has been the proof of the concordance of certain highly precise beta decay rates in nuclei. This concordance and a comparison with data from hyperon and muon decay has profound implications for theories of the universality of the weak interaction. He has recently identified five members of a new series of delayed proton emitters making him a cc-discoverer of nine of the nineteen such nuclei known below mass 100.

Frederick Kenneth Hare, President, University of British Columbia, has returned to Canada after an absence of four years. From 1945 to 1964, while at McGill University, he was, successively, Professor of Geography, Chairman of the Department of Geography and Meteorology, and Dean of the Faculty of Arts and Science, and later Master of Birkbeck College, University of London. His far ranging scientific pursuits have taken him from the geomorphology of the Middle Thames, through climatologic and ecologic problems of the Labrador Frontier, to arctic and stratospheric meteorology. He enjoys an international reputation and is one of those rare individuals who has successfully combined research with administration. Dr, Hare is a true interdisciplinary scholar.

Dr.Harrison is one of very few world authorities on the uptake of nutrients by marine algae. He has been responsible for over 190 primary publications on this subject and is the joint author on a number of textbooks and reviews covering both marine phytoplankton and macrophytes. He has co-operated extensively with other scientists in international projects (e.g. JGOFS and GLOBEC) and has been widely consulted on water management in the Canadian Pacific Ocean as well as on the coasts of China and Pakistan. His discoveries include phosphorus limitation on the coast of China, surge nutrient uptake kinetics and the definition of an artificial seawater medium.

As an internationally-respected leader in the crystallography and crystal chemistry of minerals, Dr. Hawthorne has utilized the most advanced physical and chemical analytical methods to characterize the detailed structure of an extreme variety of natural inorganic compounds. By the application of sophisticated mathematical techniques, he has been able to unify the crystal-chemical relationships between nearly all types of non-metallic minerals, and to provide a structurally sound basis for classifying all such minerals. This unified chemical-structural approach has enabled him to lay a fundamental groundwork for interpreting the paragenesis of the minerals in some of the earth's most important rock masses and ore deposits.

Paul Hebert is one of the leading population biologists in Canada. He is best known for his work on breeding system evolution which has explored the genetic characteristics of cyclic parthenogens and their obligately asexual derivatives. This work has led to the identification of a new mechanism promoting the transition from sexual to asexual reproduction. In a broader sense his work is an important component of the new wave of empirical studies which are challenging long-held views concerning the evolution of sex.

Philip Graham Hill has made impressive contributions to the thermodynamic properties of water and steam, to the mathematical modelling of turbulent flow in power and propulsion machines, to the study of electric power systems and especially through two excellent textbooks, to engineering education. Particularly noteworthy has been his work on the synthesis of a universal fundamental equation of state and his solutions of a wide range of problems in the design of power and propulsion machines. But his perspectives stretch well beyond conventional engineering practice, and his recent studies of the environmental impact of energy systems as well as their social implications have been outstanding.

Dr. Himms-Hagen's early research was on metabolism of biogenic amines. After 1958 her work on lipid metabolism and its regulation by hormones (publications 12-24) contributed to the general realization that adipose tissue was not merely a storehouse for fat but a metabolically active organ. Her recognition as an authority in this area is attested by her receipt of the Gold Medal of the American Oil Chemists' Society in 1972 and by the fact that her major review of the subject in 1967 is still a standard reference in the field. Since 1965 she has studied principally the mechanisms of mammalian heat production (publications 25-46). Her status as an authority in this field is indicated by her receipt in 1973 of the Ayerst Award of the Canadian Biochemical Society and by the high regard for two major articles she has contributed to standard reference works (1975 & 1976). Her recent research on the relation between obesity and heat production by brown adipose tissue has opened up a new field and led to a change in the direction of research in several British and U.S. centres devoted to studies on obesity in humans.

Dr. Hiruki has made major contribution to science in the area of plant virology and mycoplasmology. His pioneering work in elucidating fungal transmission of plant viruses and innovative approaches to plant mycoplasma diagnosis have been widely acclaimed. As its first President, he leads the International Working Group on Plant Viruses with Fungal Vectors. He has published extensively in journals of international repute, contributed important review chapters on several aspects of his research areas, and has been an invited speaker at numerous major international conferences, symposia, and workshops. His honours include the A. G. McCalia Research Professorship and the American Phytopathological Society Fellow Award.