- This is an example of the American Concentric that Bausch & Lomb brought to market in the mid-1880s. It is a compound monocular with 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.
- Currently not on view
- Object Name
- date made
- ca 1885
- Bausch & Lomb
- place made
- United States: New York, Rochester
- 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
- ID Number
- accession number
- catalog number
- Credit Line
- Bausch & Lomb Optical Company
- Science & Scientific Instruments
- Data Source
- National Museum of American History
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