This compound monocular is an example of the American Concentric microscope that Bausch & Lomb brought to market in the mid-1880s. It has coarse and fine focus, circular stage, and tri-leg base. The sub-stage iris diaphragm and mirror can be angled above and below the stage. The body moves, as it were, within a circular arm. The inscriptions on the stage and sub-stage apparatus read “BAUSCH & LOMB OPTICAL CO.” The inscriptions on the arm read “PAT. OCT. 3, 1876” and “PAT. OCT. 13, 1885.” Jacob Dolson Cox, a lawyer, Union Army general, governor of Ohio, Secretary of the Interior, and active microscopist, devised the form.

Ref: Bausch & Lomb, Price List of Microscopes, Objectives and Accessories (Rochester, 1884), pp. 22-23.

Ernst Gundlach, “Microscope,” U.S. Patent 182,919 (Oct. 3, 1876).

Edward Bausch, “Microscope,” U.S. Patent 328,277 (Oct. 13, 1885).

Date Made: ca 1885

Maker: Bausch & Lomb

Location: Currently not on view

Place Made: United States: New York, Rochester

Subject: Science & Scientific Instruments


See more items in: Medicine and Science: Medicine, Microscopes, Science & Mathematics


Exhibition Location:

Credit Line: Bausch & Lomb Optical Company

Data Source: National Museum of American History

Id Number: MG.M-12189Accession Number: 272522Catalog Number: M-12189272522.04

Object Name: microscope

Measurements: overall: 12 1/4 in x 7 1/2 in x 10 1/2 in; 31.115 cm x 19.05 cm x 26.67 cm

Guid: http://n2t.net/ark:/65665/ng49ca746aa-307b-704b-e053-15f76fa0b4fa

Record Id: nmah_1172333

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.