Quadrant, an ancient tool. Islamic astronomers greatly improved the quadrant before introducing it to Europe centuries later. The quadrant was an...
Measuring the distance from ship to shore, using a quadrant marked with shadow-scales, 1598. From L'usa della squadra mobile by Ottavius Fabri. .船舶
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...
Using a quadrant with a plumb bob to calculate the height of a tower by triangulation, 1551. From Rudimenta Mathematica by Sebastian Munster. .
Ptolemy, Alexandrian Greek astronomer and geographer, 1508. Ptolemy , using a quadrant to observe the Moon and stars. Urania, Muse of Astronomy,...托勒密, 天文學家, 希臘 - 南歐
coloful red, yellow, blue, green quadrants of a circle shape spinning wheel of fortune roulette with four quadrants and arrows over white textured scratched adobe material wall background - 象限儀 測量工具 幅插畫檔、美工圖案、卡通及圖標
blue colored coordinate plane axes with o origin over empty blank bright white old crumpled crushed creased recycled grainy textured paper horizontal vector backgrounds - 象限儀 測量工具 幅插畫檔、美工圖案、卡通及圖標
14th Century astrolabic quadrant, the instrument combines Islamic design and French astronomical values. Dated 14th Century.
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....
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.監視
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 ,...
An initial letter depicting Ptolemy observing the sky and making measurements using a quadrant. Ptolemy a Greek writer, mathematician, astronomer,...希臘 - 南歐
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...
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,...
Quadrant electrometer designed by William Henley and made by Adams. An electrometer is an instrument for measuring electrical potential without...
Observers using a quadrant and telescope during John Flamsteed�s time at the Royal Observatory, Greenwich, . From an early bromide print in...
Engraving from �Mathematischer Atlas� by Tobias Mayer published in Augsburg in 1745. Each plate has descriptive text on either side; some have...
Print showing a diagram of a horary quadrant, an astronomical instrument that can be used to determine the time from the position of the Sun and...
Print showing a diagram of a horary quadrant, an astronomical instrument that can be used to determine the time from the position of the Sun and...
Print of a diagram showing the way a backstaff or Davis quadrant, a navigational instrument, is used to measure the elevation of the Sun. Measured at...
Print of a diagram showing the way a backstaff or Davis quadrant, a navigational instrument, is used to measure the elevation of the Sun. Measured at...
This unsigned Islamic horary quadrant was made in Persia . Made of wood, it has hand-drawn painted scales and inscriptions and was used for finding...
This Islamic horary quadrant was made by Mustafa Ayyubi in the Middle East. Made of wood, the quadrant has hand drawn painted scales and...
On the obverse is the clinometer: this consists of two pinhole sights to be used with a quadrant scale which runs along the base and up the...
On the obverse is the clinometer: this consists of two pinhole sights to be used with a quadrant scale which runs along the base and up the...
This portable astronomical quadrant was made in London by the famous English instrument maker John Bird . It was sent with one of the expeditions...
This portable astronomical quadrant was made in London by the famous English instrument maker John Bird . It was sent with one of the expeditions...
This quadrant was produced as a paper plate for a book which could be removed and pasted on to a board. It was designed in 1700 by John Rowley, but...
This telescope, with a brass quadrant and a mahogany bracket, was made by William Robertson, who was primarily a microscope maker. It was probably...
Quadrant made by John Bird, said to have been used by Captain James Cook . Astronomical quadrants were used to measure the angle of a celestial...
Made of brass, this horary quadrant has engraved scales to a design conceived by the English mathematician Edmund Gunter in 1623. The horary quadrant...
This astronomical quadrant on a wrought iron stand was made by the French instrument maker Michael Butterfield in Paris. Astronomical quadrants were...
This astronomical instrument is an exact copy of an azimuth quadrant associated with the famous Danish astronomer, Tycho Brahe . Made around 1560, it...
This portable astronomical quadrant was made in London by the famous English instrument maker John Bird . It was sent with one of the expeditions...
'Quadrans - volubilis azimuthalis': engraving taken from Tycho Brahe's 'Astronomiae Instauratae - Mechanicae' , showing an azimuth quadrant used by...
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:- Cruger's azimuth quadrant, with...
Hevelius's quadrant, c.1659. Hevelius's quadrant, c.1659. Plate from Hevelius's 'Machina Coelestis' .
This quadrant was produced as a paper plate for a book which could be removed and pasted on to a board. It was designed in 1700 by John Rowley, but...
This portable astronomical quadrant was made in London by the famous English instrument maker John Bird . It was sent with one of the expeditions...
This quadrant, with sights, plotting scales and a gunnery scale on the obverse, was made in Rome by Jacob Lusuerg in 1674 and bears the coronet and...
This quadrant, with sights, plotting scales and gunnery scale on the obverse was made in Rome by Jacob Lusuerg in 1674 and bears the coronet and arms...
Ptolemy of Alexandria observing with a quadrant, with the goddess Astronomia behind him. Ptolemy was probably born in Egypt but produced his works...天文學家, 希臘 - 南歐
Astronomical chart showing Bootes the Ploughman holding a spear, a sickle, and two dogs, Asterion and Chara, on leash, also showing a quadrant, and...
