Scientists from Australia and New Zealand who are involved in research on the role of surface and colloid chemistry in natural aquatic systems and in the processes of water treatment contribute 11 papers first delivered to a symposium in Melbourne, June 1987. They review topics of current interest, such as humic substances and photochemistry, and detail specific advances, such as the kinetics and mechanism of estuarine coagulation. Acidic paper. Annotation c. Book News, Inc., Portland, OR (booknews.com)