|This second edition of a highly acclaimed text provides a clear and complete description of diffusion in fluids. It retains the features that won praise for the first edition--informal style, emphasis on physical insight and basic concepts, and lots of simple examples. The new edition offers increased coverage of unit operations, with chapters on absorption, distillation, extraction, and adsorption. New chapters on membranes and drug release broaden the book's scope. The entire text is extensively illustrated, and many new worked examples and homework problems have been added.