The second volume of the second section of the Handbook of Physiology, edited by W. F. Hamilton and P. Dow, is a comprehensive resource on the circulation. It covers the functional characteristics of blood vessels and their coordination in supplying blood to various organs. The volume is justifiable for experts in the field as it summarizes current knowledge rather than presenting new results. The authors, predominantly American, include contributors from other countries, providing diverse perspectives. Chapters cover topics such as circulation in skeletal muscle, skin, lungs, heart, kidneys, liver, and vascular diseases. The volume is a valuable resource for physiologists and is well-regarded by the American Physiological Society. "An Outline of Bacteriology and Immunity," by Ronald Hare, is a second edition of a popular textbook for medical students. It includes new sections on bacterial genetics and routine immunization, as well as updated chapters on fungi, rickettsiae, viruses, and bacteriophages. The book goes beyond being a textbook, offering valuable information on infection prevention, transmission, chemotherapy, and sterilization methods. It is highly recommended for medical students due to its comprehensive coverage and practical applications.The second volume of the second section of the Handbook of Physiology, edited by W. F. Hamilton and P. Dow, is a comprehensive resource on the circulation. It covers the functional characteristics of blood vessels and their coordination in supplying blood to various organs. The volume is justifiable for experts in the field as it summarizes current knowledge rather than presenting new results. The authors, predominantly American, include contributors from other countries, providing diverse perspectives. Chapters cover topics such as circulation in skeletal muscle, skin, lungs, heart, kidneys, liver, and vascular diseases. The volume is a valuable resource for physiologists and is well-regarded by the American Physiological Society. "An Outline of Bacteriology and Immunity," by Ronald Hare, is a second edition of a popular textbook for medical students. It includes new sections on bacterial genetics and routine immunization, as well as updated chapters on fungi, rickettsiae, viruses, and bacteriophages. The book goes beyond being a textbook, offering valuable information on infection prevention, transmission, chemotherapy, and sterilization methods. It is highly recommended for medical students due to its comprehensive coverage and practical applications.