Bausch & Lomb explained that their Model LA was “especially constructed for petrographical and mineralogical work to supply the demand for a thoroughly reliable instrument having all essential features at a very moderate cost.” This example is a compound monocular with coarse and fine focus, inclination joint, triple nosepiece, circular revolving circular stage, substage dome diaphragm, sub-stage mirror. A double chambered box in the tube holds the analyzing prism; the polarizer is mounted below the stage. The inscription on the black horseshoe base reads “Bausch & Lomb Optical Co. / ROCHESTER N.Y. & NEW YORK CITY.” The 52778 serial number indicates a date around 1905.
Ref: Bausch & Lomb, < i>Microscopes and Accessory Apparatus (Rochester, 1904), pp. 40-41.
Currently not on view
Object Name
date made
Bausch & Lomb Optical Company
Physical Description
brass (overall material)
steel (overall material)
glass (overall material)
black (overall color)
overall: 37.5 cm x 10.1 cm x 14.6 cm; 14 3/4 in x 3 31/32 in x 5 3/4 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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