Backstaff
date: label: date made
content: 18th century
notes: label: Description
content: Backstaff (aka Davis quadrant) that probably dates from the eighteenth century. The frame is ebony; the arcs, vanes, and inlay are boxwood.
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: Arthur R. Crittenden
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.178975
label: accession number
content: 12216
label: catalog number
content: 178975
objectType: label: Object Name
content: backstaff
physicalDescription: label: Measurements
content: overall: 25 1/4 in; 64.135 cm