Dubos's classic biography of Louis Pasteur, originally published in 1960 and for several years out of print is once again made available in this new and expanded hardcover edition. The original work has been enlarged by more than forty illustrations and tables, a new biographical sketch of Dubos, a glossary of technical terms and a chronological outline of Pasteur's career. The book's enduring appeal is a tribute both to its subject and to its author. Few scientists so captured the public imagination as Louis Pasteur, and fewer still had such a dramatic effect on everyday life. Dubos, a Pulitzer prize winner, was a modern biographer almost ideally suited to the task. A distinguished French-born microbiologist of broad culture, Dubos had a deep appreciation for the power and enduring significance of Pasteur's scientific work. To the more personal dimensions of the biographer's task, Dubos brought his keen insight into the wellsprings of human action, behavior, and personality. He thus appreciated the full range of Pasteur's life, including its philosophical, religious, and political dimensions. Finally, Dubos' graceful writing style allowed him to convey the excitement and significance of even the most technical aspects of Pasteur's work.

Contents i The Wonderful Century 3 H The Legend of Pasteur 21 m Pasteur in Action 58 . iv From Crystals to Life 90 v The Domestication of Microbial Life 116 vi Spontaneous Generation and the Role of Germs in the Economy of Nature 159 vn The Biochemical Unity of Life 188 vm The Diseases of Silkworms 209 - ix The Germ Theory of Disease 233 x Mechanisms of Contagion and Disease 267 xi Medicine, Public Health and the Germ Theory 292 xn Immunity and Vaccination 317 xin Mechanisms of Discoveries 359 xrv Beyond Experimental Science 385 Events of Pasteur s Life Arranged in Chronological Order 401 Bibliography 405 Index 409 Illustrations The author wishes to acknowledge his indebtedness to PROFESSOR PASTEUB VALLERY-RABOT and to DOCTOR HENREETXE NOUFFLABD for their help in securing photo graphs of the portraits reproduced in this book. Monsieur Jean Joseph Pasteur Madame Jean Joseph Pasteur. Pastel drawings of his father and mother made by Pasteur at the age of fifteen 26 Pasteur at the age of thirty, professor at the University of Strasbourg 38 Marie Laurent a few years before her marriage to Pasteur 38 Pasteur, student at the Ecole Normale. Drawing made by Labayle from a daguerreotype 96 Charles Chappuis, schoolmate and lifelong confidant of Pasteur. Drawing by Pasteur 96 Jean Baptiste Dumas 102 Jean Baptiste Biot 102 Pasteur approximately sixty-seven years old 168 Antoine J6r6me Balard 168 Xii ILLUSTRATIONS Pasteur approximately forty-five years old at Pont Gisquet, dictating a scientific paper to his wife 228 Pasteur and Pierre Bertin-Mourot 370 Pasteur in his laboratory of the Ecole Normale. Reproduced from the Journal Illustre, March SO, 1884 370 Louis Pasteur FREE LANCE OF SCIENCE