Backstaff

Backstaff

<< >>
Usage conditions apply
Downloads
Description
This backstaff (aka Davis quadrant) probably dates from the eighteenth century. The frame is ebony, while the arcs, vanes, and inlay are boxwood.
Location
Currently not on view
Object Name
backstaff
date made
18th century
Measurements
overall: 25 1/4 in; 64.135 cm
ID Number
PH.178975
accession number
12216
catalog number
178975
Credit Line
Arthur R. Crittenden
See more items in
Medicine and Science: Physical Sciences
Measuring & Mapping
Navigation
Data Source
National Museum of American History
Nominate this object for photography.   

Our collection database is a work in progress. We may update this record based on further research and review. Learn more about our approach to sharing our collection online.

If you would like to know how you can use content on this page, see the Smithsonian's Terms of Use. If you need to request an image for publication or other use, please visit Rights and Reproductions.

Comments

Add a comment about this object