This Continental model BB is a compound monocular with coarse and fine focus, triple nosepiece, inclination joint, square stage covered with vulcanite, sub-stage apparatus with condenser and iris diaphragm, adjustable bar for sub-stage mirror (mirror is missing), and “Bausch & Lomb Optical Co. / NEW YORK ROCHESTER, N.Y. CHICAGO” inscription on the horseshoe base. Bausch & Lomb boasted in 1900 that “Fully one-half of all microscopes sold by us are BB’s” and the “very best laboratories are equipped with them.” The 33851 serial number here indicates a date of 1901.
Ref: Bausch & Lomb, Microscopes and Accessories (Rochester, N.Y., 1900), pp. 34-35.
Currently not on view
Object Name
date made
ca 1901
Bausch & Lomb
Physical Description
metal (overall material)
glass (overall material)
brass (overall material)
overall: 37 cm x 10.6 cm x 14.5 cm; 14 9/16 in x 4 3/16 in x 5 11/16 in
place made
United States: New York, Rochester
ID Number
accession number
catalog number
Science & Scientific Instruments
See more items in
Medicine and Science: Medicine
Science & Mathematics
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Bausch & Lomb Optical Company

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