Vallery-Radot, René. La Vie De Pasteur. Paris: Librairie Hachette et Cie, 1909. Printed by Imprimerie de Charles Hérisset, Évreux. 692 pages. Volumes: 1 Volume. Twelfth Edition. Condition: Fine Plus. Half binding (Leather-Leather). Illustrations: Frontispice : photographic portrait of Pasteur by P. Nadar. "La Vie De Pasteur" is an extensive biography of Louis Pasteur, one of the most significant scientists of the 19th century, known for his groundbreaking work in microbiology and vaccination. This twelfth edition, published in 1909, reflects the enduring importance and popularity of Vallery-Radot's work. The book provides a comprehensive account of Pasteur's life, his scientific discoveries, and his impact on medicine and public health. Spanning 692 pages, the book covers the entire life of Louis Pasteur, from his early years to his major scientific achievements and contributions to science. It includes detailed descriptions of his experiments, personal anecdotes, and his relentless pursuit of scientific truth. The narrative is enriched with illustrations, including a frontispiece featuring a photographic portrait of Pasteur by the renowned photographer P. Nadar. The frontispiece of the book features a photographic portrait of Louis Pasteur by P. Nadar, a prominent French photographer known for his portraits of notable figures. This illustration adds a personal touch to the biography, connecting readers visually with the subject of the book. René Vallery-Radot (1853-1933) was a distinguished French biographer and the son-in-law of the famous scientist Louis Pasteur. His biography of Pasteur is considered the authoritative account of the scientist's life and work. Vallery-Radot's intimate knowledge of Pasteur and his access to personal documents and correspondence make this biography particularly insightful and detailed. The book is bound in a high-quality half binding, combining leather with leather corners and spine, which ensures durability and adds an element of elegance. The condition is rated as Fine Plus, indicating that the book has been exceptionally well-preserved with minimal signs of wear. This high condition rating significantly enhances its value to collectors. "La Vie De Pasteur" by René Vallery-Radot is a crucial work for anyone interested in the history of science and medicine. It provides an in-depth look at the life and achievements of Louis Pasteur, whose discoveries have had a lasting impact on public health and scientific research. The twelfth edition signifies the book's popularity and continued relevance. Its fine plus condition and high-quality binding make it a valuable addition to any collection of rare books or scientific biographies.