This Continental model A is a simple and inexpensive compound monocular with rack-and-pinion, curved arm, square stage, and sub-stage mirror. The inscription on the horseshoe base reads “Bausch & Lomb Optical Co. / ROCHESTER, N.Y.” The 41564 serial number suggests a date of 1903. Bausch & Lomb introduced the form in the 1890s, noting that it could be used for such practical purposes as examining starches, fabrics, and foods thought to be rotten or adulterated.
Ref: Bausch & Lomb, Microscopes and Accessories (Rochester, N.Y., 1900), pp. 24-25.
Currently not on view
Object Name
date made
ca 1903
Bausch & Lomb
Physical Description
metal (overall material)
glass (overall material)
brass (overall material)
overall: 32.5 cm x 10 cm x 13.5 cm; 12 13/16 in x 3 15/16 in x 5 5/16 in
place made
United States: New York, Rochester
ID Number
accession number
catalog number
Science & Mathematics
Science & Scientific Instruments
See more items in
Medicine and Science: Medicine
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Bausch & Lomb Optical Company

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