Backstaff
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1992.0038.001
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- OBJECT TYPE
- DAVIS
- DATE
- 1725–1775
- ARTIFACT NUMBER
- 1992.0038.001
- MANUFACTURER
- Cranevelt, John
- MODEL
- Unknown
- LOCATION
- Middelburg, Netherlands
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 2
- AKA
- THE ENGLISH QUADRANT
- Patents
- N/A
- General Description
- ROSEWOOD & BOXWOOD
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 63.5 cm
- Width
- 35.0 cm
- Height
- 1.8 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Marine Transportation
- Category
- Navigation instruments & equipment
- Sub-Category
- N/A
Manufacturer
- AKA
- Cranevelt
- Country
- Netherlands
- State/Province
- Unknown
- City
- Middelburg
Context
- Country
- Unknown
- State/Province
- Unknown
- Period
- Unknown
- Canada
-
Unknown - Function
-
DESIGNED FOR MEASURING ALTITUDE OF THE SUN. - Technical
-
BACKSTAFF REGARDED AS FIRST INSTRUMENT DESIGNED SPECIFICALLY FOR SEAMEN, SINCE OTHER SIMILAR INSTRUMENTS (ASTROLABE, CROSSSTAFF WERE ORIGINALLY INTENDED FOR PURE ASTRONOMICAL OBSERVATION, WITHOUT NAVIGATIONAL APPLICATIONS (REF 1, P.1) - Area Notes
-
Unknown
Details
- Markings
- 'John Cranevelt Middelbur' PRINTED ON PLAQUE ON CENTRE FRONT/ SMALL ARC BEARS USUAL SCALE OF 0-65 DEGREES/ LARGE ARC BEARS USUAL SCALE OF 0-25 DEGREES
- Missing
- SIGHTS FOR BOTH ARCS/ VANE IS NOT ORIGINAL
- Finish
- Unknown
- Decoration
- FLOWERS, STARS & FLEUR-DE-LYS INCISED ON LARGE ARC/ 3 FLOWERS INCISED ON UPPER EDGE OF SMALL ARC/ FINE LINES FORM DECORATIVE BORDERS ON MOST SURFACES/ HEEL (GRIP) ON LOWER END OF LARGE ARC ELABORATELY CARVED, WITH SCROLLED TIP
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Cranevelt, John, Backstaff, circa 1725–1775, Artifact no. 1992.0038, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/1992.0038.001/
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