Azimuth Mirror
name: label: patentee
content: Thomson, William
label: maker
content: White, James
notes: label: Description
content: William Thomson described a new "Marine Azimuth Mirror" at the 1877 meeting of the British Association for the Advancement of Science, and patented the design in Britain and the U.S.
label: Description
content: This instrument is an example of the improved design, with a reflecting prism in place of the original mirror, that Thomson introduced in the early 1880s. It was made before 1892 when Thomson became Lord Kelvin. The inscriptions read "J. WHITE GLASGOW" and "SIR W THOMSON’S PATENT No 2673." The U.S. Naval Observatory transferred it to the Smithsonian in 1966.
label: Description
content: Ref: William Thomson, "Device for Taking Azimuths," U.S. Patent #210,068.
label: Description
content: William Thomson, "Azimuth Instrument," U.S. Patent #402,364.
label: Location
content: Currently not on view
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Navigation
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content: Measuring & Mapping
creditLine: label: Credit Line
content: U.S. Naval Observatory
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.336602
label: catalog number
content: 336602
label: accession number
content: 283654
objectType: label: Object Name
content: azimuth mirror
physicalDescription: label: Measurements
content: box: 6 3/4 in x 10 1/4 in x 4 7/8 in; 17.145 cm x 26.035 cm x 12.3825 cm
label: Measurements
content: overall: 6 3/4 in x 10 1/4 in x 4 3/4 in; 17.145 cm x 26.035 cm x 12.065 cm