BOOK REVIEWS 583
liquid transfer operations including design and control of fractionating columns, calculation of ideal stages, and distillation and condensation; and adsorption are described. Each chapter in Part III essentially contains a section on equipment, methods of operation, methods of calculation and problems. Part IV on energy and mass transfer rates is the most advanced of all parts, based, as it is, on the elements of heat transfer. Heat transfer, evaporation, crystallization, agitation, mass transfer, and simultaneous heat and mass transfer including psychrometry and drying are discussed. Generally, the various subjects are treated rather briefly, no doubt due to the complexity of such a large undertaking as the description of process operations. However, the explanation of each operation is complete including equipment used, theory, methods of calculation and design of the equipment, and function. The book contains unusually fine illustrations of the details of such process equipment as crushers, conveyors, meters, pumps, compressors, filters, centrifuges, extractors, heat exchangers, evaporators and crystallizers. Each chapter includes examples and problems illustrating the theory and method of calculation for the design of the various equipment--a great aid to student and engineer alike.
E. W. HAMMER, JR.