Micro-Diffusion analysis, as described by Prof. Edward J. Conway, represents a significant advancement in modern analytical techniques. The method involves allowing gaseous products of a reaction to diffuse into an absorbent or reactant in a closed chamber, using a simple and inexpensive glass apparatus called the 'Unit.' This technique is particularly useful for analyzing micro-volumes with high accuracy, limited only by the precision of delivering and titrating fluid volumes of about 1 ml. Conway's book details the 'Unit,' the physico-chemical factors involved, the required micro-pipettes and burettes, and the errors associated with their use. It also provides comprehensive information on various analytical methods and a valuable section on volumetric titrations. The book is well-illustrated, well-produced, and should be a valuable resource for biochemists and clinicians. By Grahame Clark, this second edition of the book offers a clear and accessible introduction to archaeology. It covers the study of human past life, often in conjunction with documentary history, and emphasizes the importance of collaboration with natural sciences. The book includes chapters on archaeological discovery, preservation, excavation, and chronology, as well as discussions on social relations and the importance of honest historical research. The author's leadership in archaeological research at Cambridge adds special value to the book. Volume 4 of R. Faraday's Encyclopedia of Hydrocarbon Compounds, compiled by Dr. Joseph Escott Faraday, covers C9 compounds up to January 1, 1947. The volume follows the established format of previous parts and is expected to include the Dyson cipher for future volumes, enhancing its value. The reviewer notes some nomenclature differences, such as the naming of indane and indene, but acknowledges the challenges of systematic nomenclature. The book is a valuable resource for organic chemists. The Yearbook of the Universities of the Empire, published for the Universities Bureau of the British Empire, provides comprehensive information on university staffs and events. Despite the rapid expansion of universities and the time required for printing, the book remains a useful reference. It includes directories, general information, and reports on significant events, as well as appendices on admission qualifications, foreign students, and Anglo-American professorships. The new volume is about 100 pages longer than the 1940 edition, reflecting the growth of university systems.Micro-Diffusion analysis, as described by Prof. Edward J. Conway, represents a significant advancement in modern analytical techniques. The method involves allowing gaseous products of a reaction to diffuse into an absorbent or reactant in a closed chamber, using a simple and inexpensive glass apparatus called the 'Unit.' This technique is particularly useful for analyzing micro-volumes with high accuracy, limited only by the precision of delivering and titrating fluid volumes of about 1 ml. Conway's book details the 'Unit,' the physico-chemical factors involved, the required micro-pipettes and burettes, and the errors associated with their use. It also provides comprehensive information on various analytical methods and a valuable section on volumetric titrations. The book is well-illustrated, well-produced, and should be a valuable resource for biochemists and clinicians. By Grahame Clark, this second edition of the book offers a clear and accessible introduction to archaeology. It covers the study of human past life, often in conjunction with documentary history, and emphasizes the importance of collaboration with natural sciences. The book includes chapters on archaeological discovery, preservation, excavation, and chronology, as well as discussions on social relations and the importance of honest historical research. The author's leadership in archaeological research at Cambridge adds special value to the book. Volume 4 of R. Faraday's Encyclopedia of Hydrocarbon Compounds, compiled by Dr. Joseph Escott Faraday, covers C9 compounds up to January 1, 1947. The volume follows the established format of previous parts and is expected to include the Dyson cipher for future volumes, enhancing its value. The reviewer notes some nomenclature differences, such as the naming of indane and indene, but acknowledges the challenges of systematic nomenclature. The book is a valuable resource for organic chemists. The Yearbook of the Universities of the Empire, published for the Universities Bureau of the British Empire, provides comprehensive information on university staffs and events. Despite the rapid expansion of universities and the time required for printing, the book remains a useful reference. It includes directories, general information, and reports on significant events, as well as appendices on admission qualifications, foreign students, and Anglo-American professorships. The new volume is about 100 pages longer than the 1940 edition, reflecting the growth of university systems.