Microscope
date: label: date made
content: 1890s
name: label: maker
content: Bausch & Lomb
notes: label: Description
content: 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, triple nosepiece, curved arm, circular revolving mechanical stage, trunnion, sub-stage apparatus, sub-stage mirror, and tri-leg 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.
label: Description
content: Bausch & Lomb customized this instrument for petrographic work according to the designs of George H. Williams, professor of mineralogy and inorganic chemistry at The Johns Hopkins University. To that end, there are Nicol prisms below the stage and in a double chambered box in the tube that serve as polarizer and analyzer. An opening in the nosepiece, just above the objective, would hold a Bertrand lens. In the 1890s, this form was termed an American Type microscope, model FLD6.
label: Description
content: Ref: Bausch & Lomb, <i>Microscopes, Microtomes, Apparatus for Photo-Micrography, and Bacteriology</i> (Rochester, N.Y., 1896), pp. 46-47.
label: Description
content: George H. Williams, “On a new Petrographical Microscope of American Manufacture,” <i>American Journal of Science</i> (Feb. 1888): 114-117.
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, Rochester
topic: label: Subject
content: Science & Scientific Instruments
setName: label: See more items in
content: Medicine and Science: Medicine
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content: Microscopes
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content: Science & Mathematics
creditLine: label: Credit Line
content: Bausch & Lomb Optical Company
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MG.M-12194
label: accession number
content: 272522
label: catalog number
content: M-12194
objectType: label: Object Name
content: microscope
physicalDescription: label: Physical Description
content: metal (overall material)
label: Physical Description
content: glass (overall material)
label: Physical Description
content: brass (overall material)
label: Measurements
content: overall: 37.3 cm x 14.5 cm x 20.5 cm; 14 11/16 in x 5 11/16 in x 8 1/16 in