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Acties Weergave	Details Verwijder uit selectie Voeg toe aan selectie Afbeelding $Website\Voorwerpen\10000\V 11921.JPG; V11921; ;$ Korte omschrijving Sextant Objectnummer V11921 Objectnaam Sextant Vervaardiger Nairne and Blunt; Londen (Maker)‎ Datum 1750 - 1775 Opschrift Nairne & Blunt London Beschrijving In navigatieboekje gedateerd ca. 1780. Formaat Hoogte: 43 cm Breedte: 44 cm Achtergrondinformatie SEXTANT Ebony frame and limb with a brass index arm and fittings, a wooden handle, and an inlaid ivory plate on the crossbar. The tangent screw is on top of the index arm; the clamping screw is on the back. Three index shades (two red, one green). Index-glass adjustment by a screw; adjustment of the horizon glass by Dollond’s extended lever and clamp, operated from beneath the telescope bracket. Threaded telescope bracket with a revolving shutter and one pinhole; perpendicular adjustment by rising piece and a milled knob. One foot is missing from the frame; telescopes and other parts are missing. No box. Provenance Geodetic Institute, Delft. Peter Dollond patented the horizon glass adjustment (no. 1017 of 1772). A sextant by Nairne and Blunt with Peter Dollond’s horizon glass adjustment, dated c. 1780, is in the National Maritime Museum, Greenwich. c. 1780 Origin: London, England Maker: Edward Nairne and Thomas Blunt Signed on the ivory plate on the crossbar: * Nairne & Blunt * \| * London * Graduation: Inlaid ivory scale from - 2° 20' to 128° 20' every 20', measuring to 120°. Ivory vernier to 1', zero at the right. Dimensions: R 37 h 11.5 w 44 l 44 Literature Dollond and Dollond, Directions for Using the New Improved Hadley’s Quadrant; Mörzer Bruyns, Sextants at Greenwich, 164; Clifton, Directory, 86-87, 196, 227. Documentatie H.Hooijmaijers en W.F.J. Mörzer Bruyns, Tussen hemel en horizon,...pag. 72 Onderwerp 02.1 Zeevaartkunde (onderwerp) London; United Kingdom (geografie) Standplaats expositie Rijksmuseum Boerhaave

Afbeelding

$Website\Voorwerpen\10000\V 11921.JPG; V11921; ;$
Korte omschrijving

Sextant
Objectnummer

V11921
Objectnaam

Sextant
Vervaardiger

Nairne and Blunt; Londen (Maker)‎
Datum

1750 - 1775
Opschrift

Nairne & Blunt London
Beschrijving

In navigatieboekje gedateerd ca. 1780.
Formaat
Achtergrondinformatie

SEXTANT Ebony frame and limb with a brass index arm and fittings, a wooden handle, and an inlaid ivory plate on the crossbar. The tangent screw is on top of the index arm; the clamping screw is on the back. Three index shades (two red, one green). Index-glass adjustment by a screw; adjustment of the horizon glass by Dollond’s extended lever and clamp, operated from beneath the telescope bracket. Threaded telescope bracket with a revolving shutter and one pinhole; perpendicular adjustment by rising piece and a milled knob. One foot is missing from the frame; telescopes and other parts are missing. No box. Provenance Geodetic Institute, Delft. Peter Dollond patented the horizon glass adjustment (no. 1017 of 1772). A sextant by Nairne and Blunt with Peter Dollond’s horizon glass adjustment, dated c. 1780, is in the National Maritime Museum, Greenwich. c. 1780 Origin: London, England Maker: Edward Nairne and Thomas Blunt Signed on the ivory plate on the crossbar: * Nairne & Blunt * | * London * Graduation: Inlaid ivory scale from - 2° 20' to 128° 20' every 20', measuring to 120°. Ivory vernier to 1', zero at the right. Dimensions: R 37 h 11.5 w 44 l 44 Literature Dollond and Dollond, Directions for Using the New Improved Hadley’s Quadrant; Mörzer Bruyns, Sextants at Greenwich, 164; Clifton, Directory, 86-87, 196, 227.
Documentatie

H.Hooijmaijers en W.F.J. Mörzer Bruyns, Tussen hemel en horizon,...pag. 72
Onderwerp

02.1 Zeevaartkunde (onderwerp)
London; United Kingdom (geografie)
Standplaats

expositie Rijksmuseum Boerhaave

Details