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John Hadley
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Hadley's Quadrant
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Equations written on blackboard
Numbers and Mathematics
ball bearing. Disassembled ball bearing. rotational friction Automobile Industry, Engineering, Industry, Machine Part, Metal Industry, Sphere, Steel, Wheel
Inventors and Inventions
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Unusual Counting Systems
number zero, 0 balloon
Is Zero an Even or an Odd Number?
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History of Technology Timeline
The Apple II
10 Inventions That Changed Your World
A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England
Inventors and Inventions of the Industrial Revolution
Discover
Entrants falling and tumbling over while chasing the cheese at the 2016 'Cheese Rolling' held at Cooper's Hill, in the Cotswolds, Brockworth England
7 of the World’s Most Dangerous Festivals
Ahura Mazda - relief of the Zoroastrian god Ahura Mazda at the ancient ruins of Persepolis in Iran. Also known as Ormazd Zoroastrianism,
Which Religion Is the Oldest?
African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.
Timeline of the American Civil Rights Movement
July, 2006, Launch of Space Shuttle Discovery STS-121. See attached for full caption information.
Will Light-Speed Space Travel Ever Be Possible?
New Zealand. Political/Physical map. Includes locator.
Where Is “Old Zealand”?
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12 Novels Considered the “Greatest Book Ever Written”
Fish. Lionfish. Lion-fish. Turkey fish. Fire-fish. Red lionfish. Pterois volitans. Venomous fin spines. Coral reefs. Underwater. Ocean. Red lionfish swims by seaweed.
10 of the World’s Most Dangerous Fish

John Hadley: Facts & Related Content

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Facts

Born April 16, 1682 • Hertfordshire • England
Died February 14, 1744 (aged 61) • England
Inventions octant

Photos

Hadley's Quadrant
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John Herschel
Sir John Herschel, 1st Baronet
English astronomer
Richard Trevithick, detail of an oil painting by John Linnell, 1816; in the Science Museum, London.
Richard Trevithick
English engineer
Charles Babbage
Charles Babbage
British inventor and mathematician
George Cayley, detail of an oil painting by Henry Perronet Briggs, 1840; in the National Portrait Gallery, London
Sir George Cayley
British inventor and scientist
British chemist and physicist James Dewar
Sir James Dewar
British scientist
Arkwright, detail of an engraving by J. Jenkins after a portrait by Joseph Wright
Sir Richard Arkwright
British industrialist and inventor
Charles Wheatstone.
Sir Charles Wheatstone
British physicist
Sir William Fothergill Cooke
British inventor
Gowin Knight
English scientist
Galileo
Galileo
Italian philosopher, astronomer and mathematician
Joseph Slepian
American electrical engineer and mathematician
Charles, Jacques-Alexandre-César
Jacques Charles
French physicist
Understanding Newton's theory of universal gravitation
Isaac Newton
English physicist and mathematician
Alan Turing
Alan Turing
British mathematician and logician
William Oughtred, watercolour by George Perfect Harding after an engraving by Wenceslaus Hollar, 1644; in the National Portrait Gallery, London.
William Oughtred
English mathematician
Tim Berners-Lee
Tim Berners-Lee
British scientist
Sir John A. Pople
British mathematician and chemist
Daniell, John Frederic
John Frederic Daniell
British chemist
Edmund Gunter
English mathematician
Nicholson, William
William Nicholson
English chemist and inventor

Related Quizzes and Features

Quiz
ball bearing. Disassembled ball bearing. rotational friction Automobile Industry, Engineering, Industry, Machine Part, Metal Industry, Sphere, Steel, Wheel
Inventors and Inventions
Equations written on blackboard
Numbers and Mathematics