This Leitz Model CM is a compound monocular designed for petrographic work. It has coarse and fine focus, circular mechanical stage, inclination joint, sub-stage polarizer, sub-stage mirror, curvaceous V-shaped base, and wooden box with extra objectives. The objective lens has an iris diaphragm. There is an anastigmatic analyzer with an Ahrens prism and an Amici-Bertrand lens in the centering mount. The inscription reads “Ernst Leitz / Wetzlar / No 218885 / Germany.” The serial number indicates a date of 1922.
This was used by such Smithsonian curators of Mineralogy as George P. Merrill (1854-1929) and William F. Foshag (1894-1956).
Ref: Ernst Leitz, Petrological and Metallographic Microscopes (Wetzlar, 1910), pp. 14-17.
Currently not on view
Object Name
petrographical microscope
date made
ca 1925
Ernst Leitz
Physical Description
glass (overall material)
metal (overall material)
overall: 33.5 cm x 13.5 cm x 19.2 cm; 13 3/16 in x 5 5/16 in x 7 9/16 in
place made
Deutschland: Hessen, Wetzlar
ID Number
catalog number
accession number
Science & Scientific Instruments
Science & Mathematics
See more items in
Medicine and Science: Biological Sciences
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Department of Paleobiology, National Museum of Natural History, Smithsonian Institution

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