ID: 114
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Very fine brass astronomical equinoctial ring with two brass circles.
BuyNow for $8.000
- Maker :
- JEAN-BAPTISTE NICOLAS DELURE À PARIS
- Place :
- Paris
- Date :
- ca. 1690
- Color :
- Uncoloured
- Height mm.:
- 160
- Width mm.:
- 160
- Condition :
- Diameter of the equinoctial ring is 10cm.
- Bibliography :
- A Butterfield ring dial of similar design but smaller, is illustrated in Sundial at Greenwich, Hester Highton, OUP 2001, page 200, catalogue no. 186.
- Seller's ref. :
- 48701
This item is offered by Paulus_Swaen_Old_Maps
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Description
Very fine brass astronomical equinoctial ring with two brass circles with engraved foliage decoration, signed "Jean-Baptiste-Nicolas Delure A Paris", on the hanger ring.
The meridian ring is engraved with a latitude scale 90-0-90 degrees, reverse with a scale for determining solar altitude and zennith distance, an equinoctial ring with obverse engraved with hour scale in Roman numerals, the central bridge with pin-hole sliding over calendar and zodiac scales, 100 mm diam.
Jean-Baptiste-Nicolas Delure (1695-1766) was a renowned French instrument, globe maker and horologist was given the title "Ingénieur du Roi, juré en 1721-1723" (under the license of the king" (Louis the XIV) in 1721-1723). He was a Master and Juror of the Corporation des Fondeurs and appointed Ingénieur du Roi to Louis XIV. He had two workshops, both on Il de la Cite, Paris.
Jean-Baptiste-Nicolas Delure (1695-1766) was a renowned French instrument, globe maker and horologist was given the title "Ingénieur du Roi, juré en 1721-1723" (under the license of the king" (Louis the XIV) in 1721-1723). He was a Master and Juror of the Corporation des Fondeurs and appointed Ingénieur du Roi to Louis XIV. He had two workshops, both on Il de la Cite, Paris.
He was father-in-law to the fifth son of the eminent Parisian instrument maker Nicolas Bion.
Jean-Baptiste Nicolas Bion carried on both their businesses until around 1770.
Jean-Baptiste Nicolas Bion carried on both their businesses until around 1770.
The meridian ring is engraved with a latitude scale 90-0-90 degrees, the reverse with a scale for determining solar altitude and zenith distance, the quadrennials ring with obverse engraved with an hour scale in Roman numerals, the central bridge with pin-hole sliding over the calendar and zodiac scales, 100 mm diam.
This is a relatively large example of the classic pendant ring dial, useable anywhere on earth without a compass. Only the date and one's latitude are needed to determine the apparent solar time and even the North. the latitude can be determined using the quadrennial degree scale at the backside to measure the solar meridian altitude.
As the other stars appear to rotate, their position at any moment indicates the time. Sometimes called “horologium nocturnum” or “Nocturlabe” are related to the astrolabe and the sundials.
The mention of a dedicated instrument for its measurement was not found before the Middle Ages. The earlier image presenting the use of a nocturnal is in a manuscript dating from the 12th century.
Raymond Lull repeatedly described the use os a “Sphera horarum noctis”. With Martin Cortés de Albacar´s book “Arte de Navegar” published in 1551 the name and the instrument gained a larger popularity.
Timekeeping was very important to navigators at sea. Precise time was needed to use tide tables to enter harbors safely and also to regulate work shifts aboard.. Thus, the navigators could tell the time at night if the weather was clear.
The problem was that when the sky was obscured in foul weather, they had no way of knowing the exact time except by running the sand-glasses. By the middle of the 18th century, more accurate clocks became available, known as chronometers and the nocturnals fell out of use. Nocturnals are really simple analog computers. The nocturnal is simpler to use than other instruments requiring mathematical tables and trigonometry.
Quarta pars Brabantiae cujus caput Sylvaducis.
The coat of arms of Brabant and 's-Hertogenbosch do appear on the map. But the municipal arms in the columns on right and left-hand side have not yet been filled in. The map was prepared by Willibrordus van der Burgt.Considered one of the most decorative maps published by the publishing house of Blaeu.
$750
Maker : BLAEU, W.
Place : Amsterdam
Date : 1645
Brabantia Ducatus.
A very decorative map by Willem Blaeu with west is at the top. On the lower left a magnificent cartouche with a sitting female figure carrying a globe and compasses and the coat of arms of Brabant. The map encloses the area between the rivers Rhine, Meuse and Scheldt, with Namur (Namen) as the most southern town.
$400
Maker : BLAEU, W.
Place : Amsterdam, 1645
Date : 1645
Freedom of the Air.
A world map packed with information about aviation and the aluminum industry.The use of aircraft in warfare, especially in the roles of close ground support and strategic bombing, was completely revolutionized during WWII. Apart from tactics, the technology also evolved to facilitate heavier bombers, faster fighters, more capable transports and greater range all-around. One critical component of this development was using light, flexible and sturdy aluminum frames and skins for the planes, rathe...
$230
Maker : ALCOA ALUMINUM COMPANY.
Place : United-States
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East Canada and New Brunswick.
This is John Tallis’ map of East Canada or what is now Quebec and New Brunswick. Includes Montreal, Quebec City, and the St. Lawrence River valley. Features five vignettes which include American Indian warriors and a spectacular view of Quebec City. The whole is surrounded by a decorative vine motif border. The vignettes for this map were drawn by H. Warren and engraved by J. B. Allen. The map itself is the work of John Rapkin. The Illustrations after a design by H. Warren and engraved by J Ra...
$75
Maker : TALLIS, J.
Place : London
Date : 1851
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Item Location
Terms and conditions - Item Location
- 75013, Ile-de-France, France
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- No pick-ups
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