A biography of the French chemist who was the founder of the microbiological sciences. The development of pasteurization techniques is only one of Pasteur's accomplisments. His name is associated with some of the largest theoretical concepts and practical applications of modern chemistry, biology, and medicine. He was passionately concerned with the welfare of mankind. His last scientific contribution proved that many infectious diseases can be controlled by vaccination, and he was the first to formulate in concrete terms a biological and chemical view of global ecology--adapted from jacket flaps.