Engraved trade card of Thomas Tuttell of Charing Cross, London, mathematical instrument maker to the king. Illustrated are scientific instruments...
Engraved trade card of Thomas Tuttell of Charing Cross, London, mathematical instrument maker to the king. Illustrated are scientific instruments...量角器
Optics system for nagivation consisting of an optical unit assembly, a sextant mirror housing, a sextant mirror eyepiece, a scanning telescope mirror...
Engraving of William Hyde Wollaston by John Jackson, after a painting by William Skelton. Wollaston was the pioneer of the fabrication of platinum...
Lithograph by Richard Lane after a sketch made using a camera lucida by Sir Francis Chantrey, of William Hyde Wollaston . Wollaston was the pioneer...
Brass sextant supported by ropes, c 1650. Plate from Johannes Hevelius's 'Machina Coelestis' , showing Havelius's brass sextant. Hevelius was an...
Sextants are optical instruments for measuring angular distances, determining latitude. In 1919, sextant design advanced with the invention of a...
This sextant was made by the optical instrument maker John Bird and is thought to have belonged to the great sea captain and explorer Captain James...緯度
Bromide print, from Hevelius's 'Machina Coelestis', 1673. Bromide print, from Hevelius's 'Machina Coelestis', 1673:- Hevelius's- steel sextant, 1640
Bromide print, from Hevelius's 'Machina Coelestis', 1673. Bromide print, from Hevelius's 'Machina Coelestis', 1673:- Hevelius's- steel sextant, 1640
Engraving from the book 'Machina Coelestis' by Johannes Hevelius . The image shows the German astronomer Hevelius using the brass sextant made by...
This brass sextant was made by the London instrument makers John and Edward Troughton. With its tripod stand and telescopic sights, it was designed...
Bromide print, from Hevelius's 'machina Coelestis', 1673. Bromide print, from Hevelius's 'machina Coelestis', 1673. Hevelius's brass sextant
This brass sextant was made by the London instrument maker, Charles Schmalcalder. With its tripod stand and telescopic sights, it was designed for...
Sextant is an optical instrument for measuring the angular distance between two objects, used in navigation for calculating latitude and longitude....緯度
Sextants like this one signed by Ramsden were used by army personnel and road builders for making military maps and surveying land for roads and...
Relics of the expedition led by Arctic explorer John Franklin and his team, 1859. Franklin and his entire crew had gone missing on a voyage to the...
The noonday rest of Lieutenant Frederick Schwatka's party under Divide Hill, whilst in search of missing Arctic explorer John Franklin and his team,...
Matthew Kiln stands at Portsmouth Docks with the Sextant self-propelled gun that he bought for 12,000 to commemorate the bravery of his father, who...
June 29: Commander Richard E. Byrd of the United States Navy looks through his sextant while his assisteant looks on as they wait for weather to...
Flamsteed's equatorially mounted sextant fitted with telescope. View from telescope side. On right of picture is the top of exterior of the Octagon...
Chief, Second and third Officers use sextants to take noon sight on board BP Tanker Company's 42,000 ton oil tanker "British Duchess"
Takyuddin and other astronomers at the Galata observatory founded in 1557 by Sultan Suleyman, from the Sehinsahname of Murad III, c.1581伊斯蘭教, 製圖技術, 插圖
Naval officer uses a sextant aboard the FREMM Aquitaine multipurpose frigate on May 11, 2017 off the coasts of Brest, western France, during an...
Naval officer uses a sextant aboard the FREMM Aquitaine multipurpose frigate on May 11, 2017 off the coasts of Brest, western France, during an...
1800s 19TH CENTURY ENGRAVING OF OLD TIME SAILOR HOLDING SEXTANT NEXT TO EAGLE & AMERICAN FLAG TYPICAL WAR OF 1812 UNIFORM
Thomas Graham, Member of Victory Corps at Polytechnic High School, Learning to use Sextant to Determine Longitude and Latitude, Los Angeles,...
