Position Micrometer
date: label: date made
content: early 1870s
name: label: maker
content: Kahler, Edward
notes: label: Description
content: Divided-lens micrometer 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.
label: Description
content: Ref: United States Naval Observatory, <i>Astronomical and Meteorological Observations Made During the Year 1874</i> (Washington, D.C., 1877), Appendix 1, “Instruments and Publications,” p. 38.
label: Location
content: Currently not on view
place: label: place made
content: United States: District of Columbia, Washington
topic: label: Subject
content: Science & Scientific Instruments
setName: label: See more items in
content: Medicine and Science: Physical Sciences
creditLine: label: Credit Line
content: U.S. Naval Observatory
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 2005.0172.14
label: accession number
content: 2005.0172
label: catalog number
content: 2005.0172.14
objectType: label: Object Name
content: Position Micrometer
physicalDescription: label: Measurements
content: 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
label: Measurements
content: 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