Title page of Quadrans Apiani by German mathematician and astronomer Peter Apian, 1532. The illustration shows his recently invented quadrant. Apian...
Quadrant electrometer designed by William Henley and made by Adams. An electrometer is an instrument for measuring electrical potential without...
Quadrants were used for calculating the position of a ship at sea. This example was made by Spencer, Browning and Rust of London.
Quadrants were used for calculating the position of a ship at sea. This example was made by Spencer, Browning and Rust of London.
This Islamic horary quadrant was made by Muhammad Abd al-Hadi-Safadi in Persia . Made of wood, it has hand-drawn painted scales and inscriptions as...
Made of brass, this horary quadrant has engraved scales to a design conceived by the English mathematician Edmund Gunter in 1623. The horary quadrant...
Made of brass, this horary quadrant has engraved scales to a design conceived by the English mathematician Edmund Gunter in 1623. The horary quadrant...
Quadrant, an ancient tool. Islamic astronomers greatly improved the quadrant before introducing it to Europe centuries later. The quadrant was an...
Initial letter depicting an astronomer observing the sky and making measurements using a quadrant. Dated 16th century.
Woodcut engraving depicting a cannon with a quadrant fitted with a shadow scale and plumb bob, being adjusted in elevation. Dated 17th century.
Woodcut engraving depicting gunners calculating the elevation of a piece of artillery using a clinometer and a quadrant marked with shadow-scales....
Construction continues on D.C. United's soccer stadium in D.C.'s southwest quadrant known as Buzzards Point July 01, 2018 in Washington, DC. D.C....
Construction continues on D.C. United's soccer stadium in D.C.'s southwest quadrant known as Buzzards Point July 01, 2018 in Washington, DC. D.C....
Couples kiss on the dance floor. Town Danceboutique is the largest gay danceclub in Washington, D.C. Northwest Washington, DC is the city's largest...
Scene looking north-west from the MRs Darley Dale station, approximately 20 miles from Derby. LMS upper quadrant signals are seen on the left while...
Pioneers of Italian aviation. The quadrant of the signals installed at the Campo Parioli in Rome. 1911.
Crowds gather around to hear Cynthia Schemmer, left, and her band Radiator Hospital, perform at Slash Run in the Petworth neighborhood on August 27,...
Phillips after 5 is held on on the first Thursday of the month at The Phillips Collection. On September 7, 2017 people walked through the museum....
British destroyers Queensborough, Quadrant and Quality off Auckland , during the visit of the British Pacifc fleet commanded by Admiral Sir Bruce...
Some of the remaining residents gather in a courtyard of the Barry Farm housing complex on Saturday, August 12 in Washington, DC. The housing complex...
Illustration depicting a Semaphore Signal on an American railroad. One arm governs several tracks, the number of the track which is clearly shown on...
Illustration depicting a Semaphore Signal on an American railroad. One arm governs several tracks, the number of the track which is clearly shown on...
Illumination depicting an Astronomer observing the sky and making measurements using a quadrant. Dated 16th century.
Wood engraving depicting an astronomer observing the Moon and stars using a quadrant. Dated 16th century.
Close up detail of the corner quadrant during the Premier League match between Crystal Palace and Liverpool at Selhurst Park on March 31, 2018 in...
The upper quadrant with the signs of the zodiac and the lower one with the calendar, astronomical clock on the town hall, Stare Mesto square ,...
The upper quadrant with the signs of the zodiac and the lower one with the calendar, astronomical clock of the town hall, square Stare Mesto ,...
Illustration of an astronomical quadrant, an instrument used to measure angles up to 90 degrees. Dated 18th Century.
Illustration of an astronomical quadrant, an instrument used to measure angles up to 90 degrees. Dated 18th Century.
An initial letter depicting Ptolemy observing the sky and making measurements using a quadrant. Ptolemy a Greek writer, mathematician, astronomer,...
Diagram of a large metal quadrant sunk into the ground and with a protective wind shield, which was designed and used by Tycho Brahe. Tycho Brahe a...
Halls of residence, Priory Street, Coventry University, West Midlands, 2014. Quadrant Hall and Priory Hall viewed from the west.
'The Neighbours', sculpture by Siegfried Charoux, Highbury Quadrant Estate, Islington, London, 2015. View from the south.
Arundel Street area, Sheffield, South Yorkshire, 2001. Some important cutlery works still survive in Arundel Street, despite the urban renewal around...
From left to right, Geoffrey Lane, QC , Captain J. W. Jessop, Deputy Managing Director of Northeast Airlines, and Sir Morien Morgan, Director of the...
Activists Dawn Chapman and Karen Nickel wear protective masks at the West Lake Landfill in greater St. Louis, MO on June 1, 2017. They wear the masks...
This chainless bicycle is driven by a Lloyd�s cross roller gear, patented by W and J Lloyd and W Priest in 1897. Chainless bicycles became popular in...
This chainless bicycle is driven by a Lloyd�s cross roller gear, patented by W and J Lloyd and W Priest in 1897. Chainless bicycles became popular in...
Catalogue of optical, philosophical and mathematical instruments made and sold by Henry Pyefinch whose premises were to be found at the sign of the...
John Bennett was royal instrument maker to the Dukes of Gloucester and Cumberland. By the 1780s, his business, based at the Globe at Crown Court,...
Circular slide rule, made by John Brown, with two brass radial arms and an stronomical quadrant engraved on the back. A spiral slide rule affords a...
Circular slide rule, made by John Brown, with two brass radial arms and an stronomical quadrant engraved on the back. A spiral slide rule affords a...
Pierre Curie married Marie Curie in 1895, when he was already an internationally recognised physicist. With his brother Jacques, in the 1880s, he...
Pierre Curie married Marie Curie in 1895, when he was already an internationally recognised physicist. With his brother Jacques, in the 1880s, he...
This pocket sundial, made of silver and signed with the name Humphrey Cole, is set for use in a latitude of 51 degrees, 30 seconds . This type of...
This pocket sundial, made of silver and signed with the name Humphrey Cole, is set for use in a latitude of 51 degrees, 30 seconds . This type of...
This instrument was designed primarily to ensure that a cannon or mortar was elevated to the required angle. Quadrants were also used for...