The article discusses a revised edition of a geophysics textbook, which has been updated to include more detailed information on seismology and other geophysical topics. The book provides more definite conclusions on various subjects, such as the age of the Earth, which is now estimated to be between 1.3 and 3 billion years. The book also describes the Earth's central core, which is liquid and has a sharp boundary. The author's clear and direct style is praised, although some may question the certainty of his conclusions. The book is considered a valuable synthesis of geophysics and has been well-received by the scientific community. The article also reviews a new volume of the Handbuch der Experimentalphysik, which discusses the conduction of electricity in gases and flames. The book is noted for its concise summary of recent research and its potential for further study. Another review is of a book on the theory of probability by Dr. William Burnside, which is praised for its clarity and the application of mathematical methods to probability calculations. The final review is of a book on the mystery of the unborn, which is praised for its understanding of human nature and criminal behavior. The book is noted for its balanced view on capital punishment and its recognition of the perspectives of the victims' families.The article discusses a revised edition of a geophysics textbook, which has been updated to include more detailed information on seismology and other geophysical topics. The book provides more definite conclusions on various subjects, such as the age of the Earth, which is now estimated to be between 1.3 and 3 billion years. The book also describes the Earth's central core, which is liquid and has a sharp boundary. The author's clear and direct style is praised, although some may question the certainty of his conclusions. The book is considered a valuable synthesis of geophysics and has been well-received by the scientific community. The article also reviews a new volume of the Handbuch der Experimentalphysik, which discusses the conduction of electricity in gases and flames. The book is noted for its concise summary of recent research and its potential for further study. Another review is of a book on the theory of probability by Dr. William Burnside, which is praised for its clarity and the application of mathematical methods to probability calculations. The final review is of a book on the mystery of the unborn, which is praised for its understanding of human nature and criminal behavior. The book is noted for its balanced view on capital punishment and its recognition of the perspectives of the victims' families.