- This micrometer for celestial photographs dates from around 1871. In use, the photographic plate was held horizontally and seen through two microscopes. For rectangular coordinates, the microscope is moved back and forth. For position angles, the plate and its bed are rotated. Some original parts have been lost.
- This was designed by Lewis Morris Rutherfurd (1816-1892), a wealthy New Yorker who made important contributions to astronomical photography and spectroscopy. It ended up in the observatory at Columbia University.
- Ref: “Micrometer,” The American Cyclopaedia (New York, 1875), vol. 11, p. 512.
- Deborah Jean Warner, “Lewis M. Rutherfurd: Pioneer Astronomical Photographer and Spectroscopist,” Technology and Culture 12 (1971): 190-216.
- Currently not on view
- Object Name
- date made
- around 1871
- place made
- United States: New York, New York City
- overall: 18 in x 14 in x 10 1/2 in; 45.72 cm x 35.56 cm x 26.67 cm
- overall: 18 5/16 in x 13 1/2 in x 11 in; 46.51375 cm x 34.29 cm x 27.94 cm
- ID Number
- accession number
- catalog number
- Science & Scientific Instruments
- See more items in
- Medicine and Science: Physical Sciences
- Data Source
- National Museum of American History
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