Prof. M.N. Sastri D.Sc. (Andhra), Ph.D. (Durham), F.N.ASc. was on the Chemistry Faculty of the Andhra University from 1948 to 1985. Recipient of Sir P.C. Ray Gold Medal from the Calcutta University for contributions in analytical chemistry, he has published over one hundred research papers in volumetric analysis, solvent extraction, chromatography, ion exchange and chemical kinetics. He was Visiting Professor at the La Trobe University, Australia and Adjunct Professor at the San Jose State University, U.S.A. He was the Founder Vice-President of the Indian Association for Analytical Scientists and the Indian Association for Nuclear Chemists and Allied Scientists. As an Honorary Professor in the Institute of Development and Planning Studies,Visakhapattnam, Professor Sastri is currently engaged in environmental Studies. His earlier books include,An Introduction To Nuclear Science (Affiliated East-West) and Vistas in Analytical Chemistry (S.Chand).