A Brief Account of Radio-activity, authored by Francis Preston Venable and first published in 1917, offers a comprehensive and accessible introduction to the then-emerging field of radioactivity. Written for both students and general readers with an interest in science, the book traces the discovery and development of radioactivity, beginning with the pioneering work of Henri Becquerel, Marie and Pierre Curie, and Ernest Rutherford. Venable explains the fundamental concepts of atomic structure, the nature of radioactive decay, and the properties of alpha, beta, and gamma rays. He discusses the methods used to detect and measure radioactivity, the chemical and physical changes that occur during radioactive transformations, and the significance of isotopes. The book also explores the practical applications of radioactivity in medicine, industry, and research, as well as its implications for the understanding of atomic energy and the age of the Earth. Throughout, Venable emphasizes the experimental evidence and scientific reasoning that underpin the field, making complex ideas clear and engaging. A Brief Account of Radio-activity stands as a valuable historical document, capturing the excitement and promise of early 20th-century discoveries in nuclear science.