1. Microcapsules: Their Preparation and Properties.- 1. Introduction.- 2. Methods of Preparation.- 3. Properties of Microcapsules.- 4. Conclusions.- References.- 2. Ultracentrifugal Stability of Emulsions.- 1. Introduction.- 2. Evolution of the Ultracentrifugal Method.- 3. Experimental Technique.- 4. Effect of Operating Variables on Ultracentrifugal Stability.- 5. Creaming or Sedimentation.- 6. Kinetics and Mechanism of Coalescence.- 7. Attempted Correlation of Ultracentrifugal Data and Shelf-Life Stability.- References.- 3. Coalescence of Secondary Emulsions in Fibrous Beds.- 1. Introduction.- 2. Applications from the Literature.- 3. Theory of Coalescence in Porous Media.- 4. Collision Frequency.- 5. Coalescence Frequency.- 6. Dispersed Phase Flow in the Porous Bed.- 7. Separation of Dispersed Material.- 8. Theory of Droplet Attachment and Release.- 9. Summary.- References.- 4. Stability of Colloidal Dispersions in Nonaqueous Media.- 1. Introduction.- 2. Experimental Methods.- 3. Kinetics of Flocculation.- 4. Potential Energy of Attraction.- 5. Repulsion Associated with Electric Charge.- 6. Stabilization by Adsorbed Layers.- References.- 5. Stability of Interfaces.- 1. Introduction.- 2. General Remarks on Stability Analysis.- 3. Techniques of Stability Analysis.- 4. Mechanical Effects on Interfacial Stability.- 5. Effects of Transport, Phase Transformation, and Chemical Reaction.- 6. Electrical Effects.- 7. Thin Liquid Films.- 8. Concluding Remarks.- References.- Author Index.