This portable microscope model BPP is a compound monocular with rack-and-pinion, square stage, inclination joint, sub-stage condenser and diaphragm, bar for sub-stage mirror, and collapsible V-shaped base. The mirror and lenses are missing from this example. The inscription reads “BAUSCH & LOMB OPTICAL CO. / Rochester, N.Y. / B L / Z S/ 89205.” Bausch & Lomb boasted that “For physicians, veterinarians, agriculturists and others who desire a microscope for use in the field, there is none superior. The U.S. Government has put it in use after severe competitive trials.”
The “B L Z S” inscription refers to the 1907-1915 association of the Bausch & Lomb Optical Co., the Carl Zeiss Optical Works, and George N. Saegmuller.
Ref: Bausch & Lomb, Microscopes and Accessories (Rochester, N.Y., 1907), pp. 30-31.
Bausch & Lomb, A Triple Alliance in Optics (Rochester, 1908
Currently not on view
Object Name
date made
ca 1907-1915
Bausch & Lomb Optical Company
Physical Description
brass (overall material)
rubber (overall material)
steel (overall material)
glass (overall material)
black (overall color)
tan (overall color)
overall: 28 cm x 11.8 cm x 15.7 cm; 11 1/32 in x 4 21/32 in x 6 3/16 in
place made
United States: New York, Rochester
associated place
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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