Repeating Circle
name: label: maker
content: Delamarre, C.
notes: label: Description
content: The horizontal circle of this instrument is graduated to 2 minutes, and read by opposite verniers to 2 seconds; the vertical arc is graduated to 20 minutes, and read by vernier to 3 seconds. There are two telescopes: an upper one (which is missing), and a lower one that is attached to the central pillar, below the horizontal circle. The "Chollet Delamarre Constructeur Rue de Fourcy St Antoine 6 Paris" inscription refers to a craftsman who worked in Paris in the first half of the 19th century, making repeating circles, graphometers, and other mathematical instruments.
label: Description
content: Ref: Deleuil, <i>Catalogue des Instruments de Physique, de Chimie, d'Optique et de Mathématiques</i> (Paris, 1863), p. 69.
label: Location
content: Currently not on view
place: label: place made
content: France: Île-de-France, Paris
setName: label: See more items in
content: Medicine and Science: Physical Sciences
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content: Surveying and Geodesy
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content: Measuring & Mapping
publisher: label: Related Publication
content: Deleuil. Catalogue des Instruments de Physique, de Chimie, d'Optique et de Mathématiques
creditLine: label: Credit Line
content: Timothy Trace
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.317690
label: catalog number
content: 317690
label: accession number
content: 231960
objectType: label: Object Name
content: repeating circle
physicalDescription: label: Measurements
content: horizontal circle: 8 in; 20.32 cm
label: Measurements
content: lower telescope: 14 in; 35.56 cm
label: Measurements
content: overall in box: 7 1/4 in x 15 3/4 in x 10 13/16 in; 18.415 cm x 40.005 cm x 27.46375 cm