This is a wide field binocular dissecting instrument with very short tubes incorporating Porro prisms, rack-and-pinion focus, triple drum nosepiece, square stage, and wooden box. Bausch & Lomb introduced the basic form in 1925, and various modifications in subsequent years. This example was used at the Rockefeller Institute for Medical Research in New York. The inscription reads “B. & L. O. CO.” The 229585 serial number indicates a date around 1930.
Ref: Bausch & Lomb ad in Transactions of the American Microscopical Society 44 (April 1925): iii.
Currently not on view
Object Name
date made
ca 1930
Bausch & Lomb
Physical Description
brass (microscope material)
glass (microscope material)
metal (microscope material)
wood (case material)
microscope: 24.9 cm x 10.5 cm x 15.4 cm; 9 13/16 in x 4 1/8 in x 6 1/16 in
case: 27.7 cm x 18.7 cm x 17.6 cm; 10 7/8 in x 7 3/8 in x 6 15/16 in
place made
United States: New York, Rochester
ID Number
accession number
catalog number
serial number
Science & Scientific Instruments
Science & Mathematics
See more items in
Medicine and Science: Medicine
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Rockefeller Institute through Dr. Detlev W. Bronk, President
Additional Media

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