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This is a wide field binocular dissecting instrument with very short tubes with Porro prisms, rack-and-pinion focus, square stage, and wooden box. The inscription on the eyepiece reads “BAUSCH & LOMB OPTICAL CO. / Rochester, N.Y. U.S.A. / 205170.” The triple drum nosepiece is inscribed with the B&L logo and “PAT. 3.1.1927.” The single nosepiece is inscribed “B. & L. O. CO.” The firm introduced the basic form in 1925. The serial number on this example indicates a date of around 1929.
Ref: Bausch & Lomb ad in Transactions of the American Microscopical Society 44 (April 1925): iii.
Bausch & Lomb, Microscopes, Microtomes, Colorimeters, Optical Measuring Instruments and Accessories (Rochester, N.Y., 1926), pp. 54-57.
Currently not on view
date made
ca 1930
place made
United States: New York, Rochester
Physical Description
glass (microscope material)
metal (microscope material)
wood (case material)
microscope: 21.1 cm x 10.5 cm x 15.4 cm; 8 5/16 in x 4 1/8 in x 6 1/16 in
case: 27.6 cm x 18.6 cm x 17.7 cm; 10 7/8 in x 7 5/16 in x 6 15/16 in
ID Number
catalog number
accession number
serial number
Credit Line
Department of Entomology, National Museum of Natural History, Smithsonian Institution
Science & Scientific Instruments
See more items in
Medicine and Science: Medicine
Science & Mathematics
Data Source
National Museum of American History


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