Microscope

Bausch & Lomb

Description

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.

This instrument, made by 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.

Credit Line

Carnegie Institution of Washington

ca 1940

ID Number

1993.0115.01.1

catalog number

1993.0115.01.1

accession number

1993.0115

Object Name

microscope

Physical Description

metal (overall material)

Measurements

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

place made

United States: New York, Rochester

National Museum of American History

subject

Science & Scientific Instruments

Record ID

nmah_1163949

Usage of Metadata (Object Detail Text)

CC0

GUID (Link to Original Record)

http://n2t.net/ark:/65665/ng49ca746aa-073d-704b-e053-15f76fa0b4fa