overall: 34.4 cm x 14.4 cm x 18.8 cm; 13 17/32 in x 5 21/32 in x 7 13/32 in
Object Name:
microscope
Other Terms:
microscope; Monocular
Place made:
United States: New York, Rochester
Associated place:
United States: New York, Rochester
Date made:
ca 1887
Description:
Bausch & Lomb designed the Model microscope (No. 520) “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 basic stand with wooden case cost $25; with two objectives and camera lucida it cost $45. This example is of that sort. It is a compound monocular with coarse and fine focus, trunnion, circular stage, sub-stage mirror, and Y-shaped base. The tube and stage are brass; the stand is black iron. An inscription on the arm reads “PAT. OCT. 3, 1876 / PAT. OCT. 13, 1885.” An inscription on the objective reads “Bausch & Lomb Optical Co. Rochester, N.Y.”
This instrument has been customized for petrographic work. To that end, there is a double chambered box in the tube for holding an analyzer. An opening in the nosepiece, just above the objective, is designed to hold a Bertrand lens. The polarizer, which should be below the stage, is missing.
Ref: Bausch & Lomb, <i>Illustrated Catalogue</i> (Rochester, 1884), pp. 12-13.
Sharp & Smith, <i>Catalogue of Surgical Instruments</i> (Chicago, 1889), pp. 858-859.
