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Object number
W-224
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Classification
Navigational
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Object name
Backstaff
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Title
Backstaff: Davis
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Creator
Unidentified
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Description
Arcs of boxwood; limbs of rosewood. Missing vanes, ivory plate on horizon limb, and ivory note plate on back of brace. Greater arc, 0-65 degrees every one degree, with vane edge calibrated 0-60 degrees every 5 degrees. End of arc broken off. Short arc, 65-90 degrees every ten degrees on inner edge, and 0-25 degrees every five degrees on outer edge; by transversals to one degree. Clusters of circles; scrolling end.
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Inscription/Sig.
Unsigned. Marked at the end of the main strut (stamped): 4
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Period
c. 1760
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Material
boxwood, rosewood
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Place Of Prod.
England, Canada, or United States
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Dimensions
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Imperial(in) |
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Metric(cm) |
| Height |
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62.8 |
| Width |
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35.2 |
| Depth |
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1.7 |
| Diameter |
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| Circumference |
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Frame
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Imperial(in) |
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Metric(cm) |
| Height |
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