PIONEERING FRENCH MICROBIOLOGIST AND CHEMIST WHO DEMONSTRATED THE GERM THEORY OF DISEASE AND DEVELOPED THE FIRST VACCINE AGAINST RABIES. EXCEPTIONAL ORIGINAL 4.25 X 6.5 CABINET PHOTOGRAPH BY PIERRE PETIT OF PARIS (SO NOTED ALONG BOTTOM BORDER) SIGNED IN BLACK INK, “L. PASTEUR.” IN FINE CONDITION, WITH A BIT OF TRIVIAL FOXING. A VISUALLY APPEALING EXAMPLE FROM A HISTORY-CHANGING SCIENTIST. QUITE UNCOMMON IN SIGNED PHOTOGRAPHS.