universal equatorial sundial
Date1790
Inventory Number7106
ClassificationSundial
Subject
Maker
G. Winckler
Cultural Region
Place of Origin
DimensionsOverall: 2.1 lb., 10 x 2.2 x 9.7 cm (0.9 kg, 3 15/16 x 7/8 x 3 13/16 in.)
Overall - Storage: 11.2 x 11.4 x 3.2 cm (4 7/16 x 4 1/2 x 1 1/4 in.)
Overall - Storage: 11.2 x 11.4 x 3.2 cm (4 7/16 x 4 1/2 x 1 1/4 in.)
Material
AccessoriesLeather covered rectangular case and 4 leveling screws. Paper with calculations in pencil and printed "KUNSTAUKTIONSHAUS Math. Lempertz ...Koln " loose in case.
DescriptionEquinoctial dial with a continuous circular chapter ring marked 4-12, 1-8, subdivided in 1/2 hour increments. The vertical angle of the chapter ring is adjustable for northern latitudes from 12° to 90°, calibrated in 1° increments. The compass rose is divided into 8 points with the 4 quadrants marked: "O", "S", "W", and "N" with a magnetic declination line offset approximately 17° to the west of North.,square,Two liquid filled levels are mounted beneath the base. Leveling screws must be removed to fit in case . They ar marked I-IIII to match correspondingly marked threaded holes in base. Chapter ring has very low resolution relative to the potential accuracy of the instrument.
Equinoctial Table-type Dial with liquid levels by Winckler with leather case
Equinoctial Table-type Dial with liquid levels by Winckler with leather case
SignedSigned "G. Winckler à Berlin" engraved on compass face.
Curatorial RemarksChristie's DC830/95. Winckler is not listed in Zinner.
FunctionTime-finding by orienting the gnomon to point toward the North Pole with the aid of a magnetic compass and an angular adjustment for latitiude.
ProvenanceJoseph Drecker, Aachen, Germany, before 1928 (no. 66); Frederik Casparus Wieder, Noordwijk, The Netherlands, 1928; D. P. Wheatland, Topsfield, MA, 1959; gift to CHSI, ca. 1987.
George Dollond (I)
Date: circa 1830
Accessories: Mahogany box with fitted interior and two exterior brass hooks and two brass hinges.
Object number: 7056
Thomas & Jonathon Mason
Date: circa 1815
Accessories: Brass box, unlined, with interior fittings to hold dial in place
Object number: 7073
English
Date: circa 1770
Accessories: Fitted red leather case with red cloth interior.
Object number: 7119
Jacobus Lusberg
Date: date 1688
Accessories: Oval green sharkskin fitted case and seperate plummet.
Object number: 7068
Matthew Berge
Date: circa 1810
Accessories: Fine fitted wooden case with provision for mounting the dial on top. and handwriiten instructions for use of sundial.
Object number: 7477
Al. Zimmerman
Date: circa 1840
Accessories: Original wood and brown leather case.
Object number: 7487
Thér Barrelet
Date: date 1793
Accessories: None. Plumb bob is missing.
Object number: 7114
Claude Dunod
Date: circa 1725
Accessories: None. Unit is housed in a protective box
Object number: 7120