Melvin Alexander Preston, Professor of Physics, McMaster University, is a nuclear theoretical physicist with an international reputation. A graduate from the honour Mathematics and Physics course of the University of Toronto, with a master's degree later in applied mathematics, he received his Ph.D. in mathematical physics from the University of Birmingham in 1949. During World War II he served as Captain in the Royal Canadian Artillery and Technical Staff Officer in the Directorate of Artillery. Until 1953 he was on the staff of the University of Toronto and Visiting Professor at Chalk River in the summers. Since 1953 he has been on the staff of McMaster. He is well known for his extension of the theory of alpha-decay, review work on beta-decay and its nature, and work on nucleon forces with repulsive cores.

In the last 15 years, Dr. Puddephatt has made a remarkable number of important contributions in the area of organometallic chemistry of the platinum group and coinage metals. Most of his work has been concerned with a detailed understanding of the role of transition metal compounds in catalytic reactions. For example, he has made key studies of the reactivity of metal alkyls and hydrides. His recent binuclear and cluster Pt and Pd compounds have been found to be the best mimics of platinum surface catalysis yet discovered. Very novel bimetallic clusters have been prepared and these are important model systems for bimetallic catalysts. He has published over 220 papers in the primary literature as well as numerous reviews and two books.

Purdy is an internationally recognized specialist in experimental and theoretical studies of phase transformations. His outstanding contributions include: - Advances in understanding ternary phase transformations; studies of intermetallic compounds culinating in development of a series of new ductile materials exceptionally resistant to time-dependent high-temperature deformation; the role of elastic energy in the stabilization of precipitate arrays; the study of interface migration in alloy steels. He is a co-discoverer of the phenomenon of Chemically Induced Grain Boundary Migration (CIGM) in solids. His work has initiated research in other laboratories and has led to important technological applications.

After completing his university training at Cambridge, D.A. Ramsay joined the staff of the National Research Council laboratories in 1949. His prime interests are problems of molecular spectra and molecular structure. His analysis of the spectrum of the NH2 molecule represents not only the first analysis of the electronic spectrum of an asymmetric top molecule, but also demonstrated a new and unforeseen type of vibration-electronic interaction. His discovery that the ground state of the C2 molecule is a singlet rather than a triplet state as usually supposed is of widespread interest to physics, chemistry and astrophysics. His numerous publications are a true indication of the energy, insight and originality which he has applied to his scientific work.

David J. Randall is internationally known for his investigations of circulation and breathing in fishes. Early investigations of the effects of exercise and low oxygen environments have now led him to basic studies of the evolution of air breathing by vertebrate animals. His research has centered on the problems that a fish encounters while using its gills to acquire oxygen from water, rid its body of carbonic acid and, at the same time, minimize the loss of essential minerals and water. His interest in these problems of gas and ion exchange prompted him to organize a highly successful expedition to the Amazon basin, where many fishes breathe air and are thought to show significant physiological mechanisms in the evolution of air breathing by land vertebrates. His claims to fellowship in the Royal Society of Canada rest on both the number of original discoveries and his many critical reviews of the literature on respiration and circulation of fishes. He is co-editor and has contributed extensively to an eight volume treatise on fish physiology.

J.N.K. Rao is one of the world's foremost authorities in sampling survey theory and methods. His work in this area has profoundly influenced theory and practice alike. Indeed, he may very well be the world's leading contributor in this regard. He has made fundamental, ground breaking contributions to all aspects of survey sampling, ranging from its foundational aspects to complex survey design and analysis. These contributions have had a seminal impact on the way surveys are conducted and analyzed throughout the world today. J.n.k. Rao has made major contributions to other important areas including linear models and variance components, time series analysis, design of experiments, and bioassay.

Rimhak Ree is an algebraist who, since his arrival in Canada, has had a consistent record of research activity in the theory of groups and Lie algebras averaging over three papers per year. His work is highly respected by experts in the field. In his two latest papers he has discovered two new classes of simple groups and this work was recognized when he was given a special invitation to present his work at a colloquium meeting of experts in the field. His research achievements were also recognized when he was awarded contracts by both the U.S. Air Force (1957) and the U.S. Navy (1959-60) for basic research. He also held several summer research fellowships at the research institute of the Canadian Mathematical Congress. He was a Research Associate at Columbia University (1959-60) and a Visiting Lecturer at Yale University (1961-62).

Using the electrical activity evoked in the brain as a guide, D.M. Regan has explored the ways in which sensory information is processed, developing novel and brilliant techniques to explore new and fundamental concepts and to apply his findings as procedures in ophthalmology and aerospace medicine. He has also published extensively on human visual psychophysics and its applications to aviation and highway safety and to neuro-ophthalmology.

Dr. Garry L. Rempel has the remarkable distinction of having contributed significantly to fundamental aspects of catalysis, polymer science and engineering while being the inventor of a technology for polymer modification which is now the basis of a multi-million dollar Canadian industrial process. Trained as a chemist in the fundamentals of homogeneous catalysis and now Chair of a Chemical Engineering Department, he has successfully bridged the gap between basic science and process engineering. Rempel's pioneering work on catalytic polymer hydrogenation, including fundamental kinetic and mechanistic studies, lead to patents essential to the "Tornac Process" for nitrile rubbers. He is one of the world's authorities on polymer bound and entrapped catalysts and is recognized internationally as a principal contributor to reactive polymers. Few scientists can claim international recognition in the chemistry, chemical engineering and industrial engineering communities. Rempel has achieved this distinction.

Prof. H. S. Ribner is an internationally recognized authority on jet-noise, aerosonics, wing theory, sonic boom, and aerodynamics. He has nearly 100 publications to his credit, most of them in refereed journals and portions of books. He is a consultant to the aerospace industry in Canada and the USA. He has served as the Chairman of the International Civil Aviation Organization's Panel on Sonic Boom. He is already a Fellow of American Physical Society, Acoustical Society of America, American Institute of Aeronautics and Astronautics and Canadian Aeronautics and Space Institute.

Dr. Ricker was born at Waterdown, Ont. and received his university education (B.Sc., M.Sc., and Ph.D.) at the University of Toronto. After a period of field work in Ontario he worked from 1931-38 with Fisheries Research Board of Canada studying the habits and scientific propagation of the sockeye salmon at Cultus Lake, B.C. From 1938-39 he worked with International Pacific Salmon Fisheries Commission at Hell's Gate and on the lower Fraser River. During 1939-50, he was Assistant Professor, Associate Professor and Full Professor of Zoology at the University of Indiana, and Director of the Indiana Lake and Stream Survey, and of research on the fish populations of Indiana. From 1950-62, he served as Editor of publications for Fisheries Research Board of Canada. He has a working knowledge of French, German and Russian. During 1962-63 and 1964-66, he was Biological Consultant to the Board and staff of the Fisheries Research Board and was Acting Chairman of the Board from 1963-64. In 1966, was made Chief Scientist (a first appointment) of the Board and during 1966-67 was Acting Director of Nanaimo Biological Station. Dr. Ricker is acknowledged internationally to be among the leading authorities on world fishery resources and, in Canada, as the foremost Fisheries Scientist. His many years of field investigation along with his knowledge of the East Coast and the fresh water fisheries of the Central Region have established his role as a chief consultant on matters concerning the Canadian fisheries. His Handbook of Computations for Biological Statistics of Fish Populations is used as a standard reference throughout the world. He is most concerned about the impending crisis of protein shortage in the world by the end of this century and the need for conservation and protection of Canada's most important renewable source of animal protein. He has worked vigorously to build up the salmon fishery through scientific propagation and to combat the factors and practices which threaten the marine resources, namely, predation, pollution of waters and careless overexploitation.