**Magnetohydrodynamics Energy Conversion** By Richard J. Ross, McGraw-Hill Book Company, Inc., New York, N.Y., 1968. xv and 234 pages. $17.50 **Reviewed by Stewart Way** This book, authored by a pioneer in the field, is a valuable resource on MHD power generation. Clearly written, it is suitable for graduate students, practicing engineers, and MHD specialists. The book covers fundamental concepts, equilibrium ionization, conductivity, flow phenomena, and engineering considerations. It also discusses nonequilibrium ionization, magnet design, and power plant arrangements. While primarily focused on generators using seeded noble gases, it provides a comprehensive treatment of MHD power systems. **Electric Propulsion** **Physics of Electric Propulsion** By Robert G. Jahn, McGraw-Hill Book Company, Inc., New York, N.Y., 1968. 339 pp. $814.50 **Reviewed by F. A. Lyman** This book serves as a graduate-level text on electric propulsion, emphasizing physical principles over technology. The first five chapters provide background in electromagnetic theory, ionization, collision phenomena, and plasma physics. The remaining four chapters detail various types of electric acceleration methods. The book includes problems at the end of each chapter and is well-suited for students and researchers seeking an overview of the physics of electric propulsion. However, it may not be as useful for those seeking detailed analytical and experimental information. **Behavior of Liquid** **Dynamics of Elastic Containers Partially Filled With Liquid** (Applied Physics and Engineering Series, Vol. 5.) By I. M. Rapaport, Springer-Verlag, New York, 1968. viii and 308 pages. $814.80 **Reviewed by H. F. Bauer** This book provides a detailed mathematical foundation for understanding the dynamics of liquids in moving containers and the interaction between the liquid and the container. It covers velocity potential, fluid pressure, forces, moment equations, and moments of inertia. The equations of motion for an elastic body partially filled with liquid are discussed, along with boundary value problems and vibrations. The book is mathematically rigorous but lacks practical numerical evaluations, making it more useful for scientists and engineers interested in a theoretical approach.**Magnetohydrodynamics Energy Conversion** By Richard J. Ross, McGraw-Hill Book Company, Inc., New York, N.Y., 1968. xv and 234 pages. $17.50 **Reviewed by Stewart Way** This book, authored by a pioneer in the field, is a valuable resource on MHD power generation. Clearly written, it is suitable for graduate students, practicing engineers, and MHD specialists. The book covers fundamental concepts, equilibrium ionization, conductivity, flow phenomena, and engineering considerations. It also discusses nonequilibrium ionization, magnet design, and power plant arrangements. While primarily focused on generators using seeded noble gases, it provides a comprehensive treatment of MHD power systems. **Electric Propulsion** **Physics of Electric Propulsion** By Robert G. Jahn, McGraw-Hill Book Company, Inc., New York, N.Y., 1968. 339 pp. $814.50 **Reviewed by F. A. Lyman** This book serves as a graduate-level text on electric propulsion, emphasizing physical principles over technology. The first five chapters provide background in electromagnetic theory, ionization, collision phenomena, and plasma physics. The remaining four chapters detail various types of electric acceleration methods. The book includes problems at the end of each chapter and is well-suited for students and researchers seeking an overview of the physics of electric propulsion. However, it may not be as useful for those seeking detailed analytical and experimental information. **Behavior of Liquid** **Dynamics of Elastic Containers Partially Filled With Liquid** (Applied Physics and Engineering Series, Vol. 5.) By I. M. Rapaport, Springer-Verlag, New York, 1968. viii and 308 pages. $814.80 **Reviewed by H. F. Bauer** This book provides a detailed mathematical foundation for understanding the dynamics of liquids in moving containers and the interaction between the liquid and the container. It covers velocity potential, fluid pressure, forces, moment equations, and moments of inertia. The equations of motion for an elastic body partially filled with liquid are discussed, along with boundary value problems and vibrations. The book is mathematically rigorous but lacks practical numerical evaluations, making it more useful for scientists and engineers interested in a theoretical approach.