Position Micrometer

Position Micrometer

<< >>
Usage conditions apply
This divided-lens micrometer was made in the early 1870s, for use with the 26-inch refracting telescope at the United States Naval Observatory. A paper label on the box reads “Edw. Kahler / Manufacturer of Optical, Mathematical and Philosophical Instruments / 1807 K St. NW / Washington, D.C.” Edward Kahler (1833-1900) was a German instrument maker who was working in Washington by 1869.
Ref: United States Naval Observatory, Astronomical and Meteorological Observations Made During the Year 1874 (Washington, D.C., 1877), Appendix 1, “Instruments and Publications,” p. 38.
Currently not on view
Object Name
Position Micrometer
date made
early 1870s
Kahler, Edward
place made
United States: District of Columbia, Washington
overall: 2 3/4 in x 5 3/8 in x 2 1/4 in; 6.985 cm x 13.716 cm x 5.715 cm
overall in box: 2 15/16 in x 5 3/8 in x 2 1/4 in; 7.46125 cm x 13.6525 cm x 5.715 cm
ID Number
accession number
catalog number
Credit Line
U.S. Naval Observatory
Science & Scientific Instruments
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.


Add a comment about this object