John Harrison (English Wikipedia)

William E. Carter. "The British Longitude Act Reconsidered". American Scientist. Archived from the original on 20 February 2012. Retrieved 19 April 2015.

anthonygrayclocks.com (Global: low place; English: low place)

A Chronology of Clocks Archived 18 October 2007 at the Wayback Machine

antiquarian-horology.com (Global: low place; English: low place)

"John Harrison". Antiquarian Horology. 12 February 2024. Retrieved 6 May 2026.
"The Longitude Problem; the development of the Chronometer:". Antiquarian Horology. 12 February 2024. Retrieved 6 May 2026.

archive.org (Global: 6^th place; English: 6^th place)

Sobel, Dava (1995). Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time. New York: Penguin. p. 65. ISBN 0-14-025879-5. Retrieved 8 October 2025 – via Internet Archive.
Sobel, Dava (1995). Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time. New York: Penguin. ISBN 0-14-025879-5. Retrieved 8 October 2025 – via Internet Archive.
In 1767, the Board of Longitude published a detailed description of Harrison's H4 watch: The Commissioners of Longitude (1767). The Principles of Mr. Harrison's Time-Keeper, with Plates of the Same. London, England: W. Richardson and S. Clark.
Landes, David S. (1983). Revolution in Time. Cambridge, Massachusetts: Belknap Press of Harvard University Press. ISBN 0-674-76800-0.

basbwe.net (Global: low place; English: low place)

"An Interview with Peter Graham" (PDF) (Interview). BASBWE. 2002.

bbc.co.uk (Global: 11^th place; English: 10^th place)

"John Harrison: Timekeeper to Nostell and the world!". BBC Bradford and West Yorkshire. BBC. 8 April 2009. Retrieved 10 February 2012.

bbc.com (Global: 26^th place; English: 23^rd place)

"John Harrison clock in Leeds museum display". BBC News. 26 January 2014. Retrieved 6 May 2026.

books.google.com (Global: 3^rd place; English: 3^rd place)

The principles of Mr Harrison's time-keeper

britannica.com (Global: 37^th place; English: 64^th place)

"John Harrison - British horologist - Britannica". britannica.com. Retrieved 11 December 2021.

captaincooksociety.com (Global: low place; English: low place)

Burkholder, Ruth (1983). "Solving the Problem of Longitude". Cook's Log. 6 (4). Captain Cook Society: 222–224.

doodles.google (Global: 8,977^th place; English: 4,567^th place)

"John Harrison's 325th Birthday". www.google.com.

fer3.com (Global: low place; English: low place)

Gould, Rupert T. (1923). The Marine Chronometer. Its History and Development (PDF). London: J. D. Potter. ISBN 0-907462-05-7. {{cite book}}: ISBN / Date incompatibility (help)

fhs.ch (Global: low place; English: low place)

Federation of the Swiss Watch Industry Archived 23 June 2009 at the Wayback Machine

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Waller, Jamie (31 March 2020). "Statue of North Lincolnshire inventor John Harrison now on display in his home village". Grimsby Telegraph. Retrieved 9 December 2021.

hsn161.com (Global: low place; English: low place)

Harrison, John (1775). A Description concerning such Mechanism as will afford a nice, or true Mensuration of Time; together with Some Account of the Attempts for the Discovery of the Longitude by the Moon; and also An Account of the Discovery of the Scale of Musick (PDF). London.

independent.co.uk (Global: 46^th place; English: 29^th place)

Sommerlad, Joe (3 April 2018). "Who was the British clockmaker who completely revolutionised navigation?". The Independent. Retrieved 31 August 2023.

lucytune.com (Global: low place; English: low place)

"The Search for the Missing Harrison Manuscript". Lucytune.com. Retrieved 28 September 2012.

modernistbritain.co.uk (Global: low place; English: low place)

"Summit House, London". Modernist Britain. Retrieved 3 April 2018. On the corner of Dane Street there is a Blue Plaque dedicated to John Harrison (1693–1776)

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nmm.ac.uk (Global: low place; English: low place)

"Harrison's Marine timekeeper (H1)". National Maritime Museum. Retrieved 25 February 2008.
"Harrison's Marine timekeeper (H2)". National Maritime Museum. Retrieved 25 February 2008.
"Harrison's Marine timekeeper (H3)". National Maritime Museum. Retrieved 25 February 2008.

northernrail.org (Global: low place; English: low place)

"Northern Honours Inventor John Harrison". northernrail.org/news. 27 April 2014. Retrieved 6 March 2015.

rmg.co.uk (Global: 6,393^rd place; English: 4,093^rd place)

rmg.co.uk

"Longitude found - the story of Harrison's timekeepers". www.rmg.co.uk. Retrieved 6 May 2026.
"What is the Prime Meridian, and why is it in Greenwich?". www.rmg.co.uk. Retrieved 6 May 2026.

collections.rmg.co.uk

"Harrison's Marine timekeeper (H4)". National Maritime Museum. Retrieved 25 February 2008.

scunthorpetelegraph.co.uk (Global: low place; English: low place)

"Train naming tribute to world famous inventor John Harrison". Scunthorpe Telegraph. 26 April 2014. Archived from the original on 2 April 2015. Retrieved 6 March 2015.

sea.museum (Global: low place; English: low place)

"A beginners guide to longitude". Australian National Maritime Museum. 10 September 2024. Retrieved 6 May 2026.

sothebys.com (Global: 3,444^th place; English: 2,502^nd place)

"(#535) John and James Harrison, A historically significant Ebonized Precision Longcase Clock, English, circa 1726". Sothebys.com. Retrieved 6 May 2026.

theguardian.com (Global: 16^th place; English: 11^th place)

McKie, Robin (18 April 2015). "Clockmaker John Harrison vindicated 250 years after 'absurd' claims". The Observer. p. 7. Retrieved 23 April 2015.

watchesbysjx.com (Global: low place; English: low place)

Lake, Tim. "In-Depth: The Microscopic Magic of H4, Harrison's First Sea Watch. A heart of diamond". WatchesbySJX. Retrieved 2 September 2019.

web.archive.org (Global: 1^st place; English: 1^st place)

William E. Carter. "The British Longitude Act Reconsidered". American Scientist. Archived from the original on 20 February 2012. Retrieved 19 April 2015.
Federation of the Swiss Watch Industry Archived 23 June 2009 at the Wayback Machine
A Chronology of Clocks Archived 18 October 2007 at the Wayback Machine
"Train naming tribute to world famous inventor John Harrison". Scunthorpe Telegraph. 26 April 2014. Archived from the original on 2 April 2015. Retrieved 6 March 2015.

worldcat.org (Global: 4^th place; English: 4^th place)

search.worldcat.org

Clowes, William Laird (1898). The Royal Navy: A History From the Earliest Times to the Present. Vol. 3. London: Sampson, Low, Marston and Company. OCLC 645627800.

worldhistory.org (Global: 2,330^th place; English: 1,976^th place)

Cartwright, Mark (14 March 2023). "Harrison's Marine Chronometer". World History Encyclopedia.

John Harrison (English Wikipedia)

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