This is a compound monocular with coarse and fine focus, circular stage, trunnion, sub-stage two-sided mirror, and Y-shaped base. The inscription on the stage reads “BAUSCH & LOMB / OPTICAL CO.” The inscription on the arm reads “PAT. OCT. 3, 1876 / PAT. OCT. 13, 1885.”
Bausch & Lomb introduced this form in 1884, terming it the Model No. 520 and noting that it had been constructed “in compliance with a generally expressed demand for a simple, low-priced and well-made instrument, which is adapted to every grade of work.” The stand with case cost $25; with two objectives and camera lucida it cost $45.
In 1900, Bausch & Lomb termed this the American Type Microscope, Model F, noting that it “represents a distinct type of instrument, possessing the advantages of lightness, graceful proportions, and convenience for working combined with stability and low cost. It has been for many years the standard instrument in a large number of laboratories, and a prime favorite with individual workers.”
Ref: Bausch & Lomb, Illustrated Catalogue (Rochester, 1884), pp. 12-13.
Bausch & Lomb, Microscopes and Accessories (Rochester, 1900), pp. 46-47.
Ernst Gundlach, “Improvement in Microscopes,” U.S. Patent 182,919 (Oct. 3, 1876).
Edward Bausch, “Microscope,” U.S. Patent 328,277 (Oct 13, 1885).
Currently not on view
Object Name
date made
ca 1890
Bausch & Lomb
place made
United States: New York, Rochester
ID Number
catalog number
accession 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
Estate of William Whiting

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