3929202 Louis Pasteur, from Living Biographies of Great Scientists. by Gordon, Ross (1873-1946); (add.info.: Louis Pasteur, 1822 -1895. French biologist, microbiologist and chemist renowned for his discoveries of the principles of vaccination, microbial fermentation and pasteurization. Illustration by Gordon Ross, American artist and illustrator (1873-1946), from Living Biographies of Great Scientists.).