The Universal microscope that Bausch & Lomb introduced 1884 was similar to the popular Investigator but larger and heavier and equipped with several new features. The basic stand with case cost $55; with two objectives and camera lucida it cost $80. This example is of that sort. It is a compound monocular with coarse and fine focus, large circular stage, inclination joint, sub-stage condenser and iris diaphragm, sub-stage mirror, and tri-leg base. The inscription on the arm reads “PAT. OCT. 3 1876 / PAT. Oct. 13, 1885.” The inscriptions on the stage read “Bausch & Lomb Optical Co.” and “HENRY KAHN SAN FRANCISCO” (this refers to the dealer). There is an bracket at the bottom that we do not understand.
Ref: Bausch & Lomb, Price List of Microscopes, Objectives and Accessories (Rochester, N.Y., 1884), pp. 20-21.
Ernst Gundlach, “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 1885
Physical Description
glass (overall material)
brass (overall material)
overall: 37.7 cm x 18.3 cm x 22.7 cm; 14 13/16 in x 7 3/16 in x 8 15/16 in
place made
United States: New York, Rochester
ID Number
catalog number
accession 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
Additional Media

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