Microscope
date: label: date made
content: ca 1940
name: label: maker
content: Bausch & Lomb
notes: label: Description
content: Barbara McClintock (1902-1992) used this microscope in the 1940s and 1950s for research on transposing genetic elements or “jumping genes” in maize. In this process, segments of DNA jump from one location on a chromosome to another. When Dr. McClintock published her results, she met with skepticism from many fellow geneticists. However, in 1983 she was awarded the Nobel Prize for her work. It was eventually determined that these elements are found in virtually all living organisms.
label: Description
content: This instrument, made by the Bausch & Lomb Optical Co., is fitted with a circular mechanical revolving stage designed specifically for photomicrography. Dr. McClintock gave the microscope, and its set of apochromatic lenses, to Dr. Joseph C. Gall of the Carnegie Institution in Washington, D.C. in the summer of 1977. She told him she no longer needed it and wanted it to be in safe hands. In 1993 the Carnegie Institution donated the instrument to the Smithsonian Institution.
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: Biological Sciences
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content: Microscopes
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content: Science & Mathematics
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content: Artifact Walls exhibit
creditLine: label: Credit Line
content: Carnegie Institution of Washington
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1993.0115.01.1
label: catalog number
content: 1993.0115.01.1
label: accession number
content: 1993.0115
objectType: label: Object Name
content: microscope
physicalDescription: label: Physical Description
content: metal (overall material)
label: Measurements
content: average spatial: 31.1 cm x 17.7 cm x 19 cm; 12 1/4 in x 6 15/16 in x 7 1/2 in