French-Style Sector
date: label: date made
content: 18th century
notes: label: Description
content: The arms of this brass instrument have straight edges, but the hinge is decorated with a straight and squiggly lines. One side has a double scale of chords that runs from 10 to 130; a double scale for "Les Solides" that runs from 1 to 60; and a double scale for the specific weights of four metals, marked with their symbols. Two holes are drilled on either side of the 80 mark on the scales of chords on the lower arm. The outer edge of the lower arm has a scale that runs from 4 to 24 and is labeled "pd des boulets" (for the weight of iron shot).
label: Description
content: On the other side, the outer edge has a scale that runs from 4 to 24 and is labeled "Cbres des Pieces" (for the size of iron shot, given the diameter of the barrel and the weight of the shot). There are double scales of equal parts, running from 10 to 200; for architectural drawings, running from 10 to 60; and for inscribed regular polygons, from 12 sides to three sides. Compare to MA.321676 and 1985.0580.04.
label: Description
content: According to the accession file, the donor collected this instrument in Mobile, Ala., around 1898 and sent it to the Smithsonian in 1936.
label: Location
content: Currently not on view
place: label: place made
content: France
topic: label: Subject
content: Mathematics
label: Subject
content: Sectors
label: Subject
content: Rule, Calculating
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Sectors
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of J. G. Sparkes
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.311165
label: catalog number
content: 311165
label: accession number
content: 141741
objectType: label: Object Name
content: sector
physicalDescription: label: Physical Description
content: brass (overall material)
label: Measurements
content: overall: .3 cm x 17.5 cm x 3 cm; 1/8 in x 6 7/8 in x 1 3/16 in