Microscope used by Louis Pasteur in his investigations on...
Microscope used by Louis Pasteur in his investigations on silkworm diseases, Paris, France, 1860-1870
Microscope by E. Hartnack et Cie, Paris with two objective lenses, two eyepieces and wooden mahogany case, 1850-1868, used by Pasteur in his investigation of silkworm disease, 1868