Theodolite
date: label: date made
content: 1840s
name: label: maker
content: Jones, Thomas
notes: label: Description
content: This early example of a transit theodolite was made for the U. S. Coast Survey in the 1840s. The "Thomas Jones, 4 Rupert St London" inscription refers to Thomas Jones (1775–1852), an instrument maker who worked for Jesse Ramsden, and who was elected a Fellow of the Royal Society of London in 1835.The horizontal and vertical circles are silvered, and read by verniers and magnifiers to 30 seconds.
label: Description
content: Ref: Gloria Clifton, <i>Directory of British Scientific Instrument Makers 1550–1851</i> (London, 1995), p. 154.
label: Location
content: Currently not on view
place: label: place made
content: United Kingdom: England, London
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Surveying and Geodesy
label: See more items in
content: Measuring & Mapping
publisher: label: Related Publication
content: Clifton, Gloria and Gerard L. E. Turner. Directory of British Scientific Instrument Makers 1550-1851
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.314634
label: accession number
content: 208213
label: catalog number
content: 314634
objectType: label: Object Name
content: theodolite
physicalDescription: label: Measurements
content: overall: 13 5/8 in; 34.6075 cm
label: Measurements
content: horizontal circle: 5 1/2 in; 13.97 cm
label: Measurements
content: vertical circle: 5 1/2 in; 13.97 cm
label: Measurements
content: telescope: 10 1/4 in; 26.035 cm
label: Measurements
content: striding level: 4 1/4 in; 10.795 cm
label: Measurements
content: overall: 13 1/2 in x 6 7/8 in x 9 3/4 in; 34.29 cm x 17.4625 cm x 24.765 cm