Sundial
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1991.0394.001
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- OBJECT TYPE
- EQUINOCT1AL RING/UNIVERSAL
- DATE
- 1700–1800
- ARTIFACT NUMBER
- 1991.0394.001
- MANUFACTURER
- Unknown
- MODEL
- Unknown
- LOCATION
- Unknown
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 1
- AKA
- N/A
- Patents
- N/A
- General Description
- ALL BRASS CONSTRUCTION
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 15.2 cm
- Width
- 15.2 cm
- Height
- 1.7 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Exploration and Survey
- Category
- Measurement-position
- Sub-Category
- N/A
Manufacturer
- AKA
- Unknown
- Country
- Unknown
- State/Province
- Unknown
- City
- Unknown
Context
- Country
- Worldwide
- State/Province
- Unknown
- Period
- THIS TYPE OF INSTRUMENT USED IN 17TH-18TH CENTURIES
- Canada
-
Unknown - Function
-
TO DETERMINE TIME, AND DETERMINE ALTITUDE. IF MOUNTED ABOVE A MAGNETIC COMPASS, IT CAN BE USED TO MEASURE MAGNETIC DECLINATION. - Technical
-
INVENTION ATTRIBUTED TO WILLIAM OUGHTRED (1575-1660) IN EARLY 17TH C., IT HAS ITS ROOTS IN ASTRONOMY, NAVIGATION & SURVEYING. AS WELL AS TELLING THE TIME, THIS DIAL WILL MEASURE MAGNETIC VARIATION (WHEN MOUNTED ABOVE A COMPASS), OR CAN BE USED AS AN ALTERNATIVE TO MARINER'S ASTROLABE FOR MEASURING SOLAR ALTITUDE AT NOON TO DISCOVER THE LATITUDE. (REF.1) - Area Notes
-
Unknown
Details
- Markings
- MERIDIAN RING (OUTER RING) GRADUATED 90-0-80 AT 10-MINUTE INTERVALS ON ONE SIDE; 0-90 AT 10-MINUTE INTERVALS ON REVERSE. INNER RING (ROMAN CHAPTER RING?) GRADUATED I-XII I-XII AT 5-MINUTE INTERVALS ON ONE SIDE & ON INNER EDGE OF CIRCLE/ PIVOTED BRIDGE FOR PINHOLE SIGHT GRADUATED WITH CALENDAR SCALE 'D N O S A J J/ D J F M A N J' - ON ONE SIDE; SIGNS OF THE ZODIAC & SCALE '20-10-AE-10-20' [SCALE FOR SUN'S MERIDIAN ALTITUDE?] INCISED ON REVERSE
- Missing
- 1 SUPPORTING FITTING FOR INNER RING IS BROKEN BUT PRESENT. SUSPENSION RING & PINMISSING
- Finish
- Unknown
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Unknown Manufacturer, Sundial, circa 1700–1800, Artifact no. 1991.0394, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1991.0394.001/
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