162 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS product development, production, and control. Beginning with an interesting historical overview of the aerosol, Dr. Sanders carefully progresses through such areas as propellant properties, packaging components, formula systems, filling methods, particle size measurements, stability testing and flammability assess- ment as well as several elaborate chapters on aerosol foams and emulsions. The entries dedicated to aerosol containers and valving systems are most thorough and, except for only a very few minor developments within this industry since its publication, generally offers up- to-date information in good detail about these components. Basic steel, aluminum, glass (and even plastic) container compo- sition, function, and application are discussed, permitting a comfortable knowledge of this component of the aerosol package. Even special types of container concepts, such as those employing barriers and pistons, are included. Valving systems receive similar attention. The common types of valves and actuators are described with regard to component parts, construction, function and application. Special valves and actua- tors are also discussed with careful detail. A number of supplementary chapters authored by colleagues of Dr. Sanders present a series of interesting and useful topics in this issue. The ozone depletion theory is discussed from its chemistry up to the regulatory actions forcing the tran- sition of the aerosol industry. Other topics covered in these chapters are aero- sol sampling and analysis, useful in qual- ity control-realate functions, and a toxi- cological overview of fluorocarbon pro- pellants. This publication possesses a substantial amount of practical information espe- cially helpful in aerosol development. It is a most worthwhile addition to any aero- sol library.--A. DELIA--Clairol Incorpo- rated.