Written by top international experts in colloid and surface chemistry. It develops a generalized scheme for describing the interrelationships of various idealized solution model, reviews the concepts of HLB number and temperature as well as developments on the HLB system combining both methods, shows molecular aggregation is possible in an aprotic and polar solvent and compares the results obtained in N-methylsydone to those in water and formamide and more. Contains close to 750 literature references and nearly 400 useful figures, equations and tables