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Wooden Cross-staff.
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Wooden Cross-staff., result 1 of 1

Item Details
Open Artstor
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Creator
Title
Wooden Cross-staff.
A wooden cross-staff (possibly of hornbeam) made by Hamon
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Work Type
Navigation
Date
1687
Location
Saint-Malo
Material
brass (copper, zinc alloy)
paint
varnish
wood (unidentified)
Measurements
overall: 512 mm x 919 mm x 37 mm, .44 kg
Description
A wooden cross-staff (possibly of hornbeam) made by Hamon, Saint-Malo, France, 1687. The original vanes are missing. Signed and dated on side one: Hamon . A . St. Malo 1687. The scales are from 90o to 33o (side one), from 90o to 11o (side three), and from 90o to 22o (side four); the maximum reading accuracy is 15' for each side. Only vague traces of the graduation on side two are visible. Graduated for altitude only; only the side number for side one is visible. The graduation runs from right to left, the sequence of the sides is 4, 3, 2, 1. Three modern wooden vanes, for the 30-, 60- and 90-degree sides.
A wooden staff (possibly of hornbeam); the original vanes are missing. Signed and dated on side one: Hamon . A . St. Malo 1687. The scales are from 90o to 33o (side one), from 90o to 11o (side three), and from 90o to 22o (side four); the maximum reading accuracy is 15' for each side. Only vague traces of the graduation on side two are visible. Graduated for altitude only; only the side number for side one is visible. The graduation runs from right to left, the sequence of the sides is 4, 3, 2, 1. Three modern wooden vanes, for the 30-, 60- and 90-degree sides.
Cross-staff, marked "Hamon a St. Malo 1687". The staff is original but the crosses are conjectural replicas.
Accession Number
ID Number
co55537
Source
Image and original data from Science Museum Group
Rights
The source metadata displayed in the Description field is released under a Creative Commons Attribution 4.0 license.
All other source metadata is released under Creative Commons Zero.
File Properties
File Name
large_1928_0927.jpg
SSID
26429765

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