Search results “Harrison sea clocks”
A Detailed Study of H4 - John Harrison's Longitude Timekeeper Reconstruction
Buy DVD at http://www.bdvideos.co.uk/site/shop/horology/a-detailed-study-of-h4/ A reconstruction of John Harrison's successful Longitude timekeeper H4. Derek Pratt, one of the 20th century’s most talented watchmakers, had always been a fan of John Harrison and was determined that a re-creation of his most successful timekeeper H4 should be constructed. Derek started work in 1997, using other talented craftsman for the case, dial and engraving. Then in 2009, due to ill health, when approximately half of the watch had been completed, Charles Frodsham & Co took on the project which was finished in 2014. Displayed worldwide at the Ships, Clocks and Stars: The Quest for Longitude exhibitions at the National Maritime Museum, America and Australia. This is the story of that remarkable achievement.
Views: 45205 Barbara Darby
John Harrison's "H3" clock in action
John Harrison's "H3" was his third attempt at a clock that could survive sea-travel without losing time. This was in response to the "Longitude Rewards" (a challenge to develop a reliable system for determining Longitude while at sea). It was not accurate enough, so a another clock was attempted. This is the original "H3" clock, which is now in the care of the Royal Observatory Greenwich. John Harrison (https://en.wikipedia.org/wiki/John_Harrison) Longitude Rewards (https://en.wikipedia.org/wiki/Longitude_rewards)
Views: 5941 Matuga Spudd
Longitude - TV movie 2000
In the 18th century, the only way to navigate accurately at sea was to follow a coastline all the way, which would not get you from Europe to the West Indies or the Americas. Observing the sun or stars would give you the latitude, but not the longitude unless done in conjunction with a clock that would keep time accurately at sea, and no such clock existed. After one too many maritime disasters due to navigational errors, the British Parliament set up a substantial prize for a way to find the longitude at sea. The film's main story is that of craftsman John Harrison: he built a clock that would do the job, what we would now call a marine chronometer. But the Board of Longitude was biased against this approach and claiming the prize was no simple matter. Told in parallel is the 20th century story of Rupert Gould, for whom the restoration of Harrison's clocks to working order became first a hobby, then an obsession that threatened to wreck his life.
Раскошные кабинетные часы Sinclair Harding Sea Clocks John Harrison
Sinclair Harding Sea Clocks John Harrison http://www.678.ru/i_shop/sinclair-harding/sea-clocks/john-harrison-sea-clocks/ Легендарная английская часовая мануфактура Sinclair Harding вдохновлённая революционными изобретениями знаменитого часовщика Джона Харрисона представила часы Sea Clocks в которых воплотила самые интересные из его разработок. Джон Харрисон был часовщиком самоучкой и прославился тем что изобрел новый способ расчета долготы что существенно обезопасило и упростило жизнь капитанам кораблей того времени. Даже знаменитый мореплаватель и первооткрыватель Джеймс Кук использовал часы Джона Харрисона и в последствие оставил в своих журналах хвалебные отзывы о его часах. Компания Синклер Хардинг в своих Морских часах воплотила три самых знаменитых изобретения Джона Харрисона. Одним из самых известных изобретений является спуск «Кузнечик». Почти беззвучное движение этого механизма не требует совсем смазки, а значит со временем не будет проблем как у большинства часов с заменой старой вязкой смазки. На верхнем лунном циферблате часов, который к слову расписан вручную и пронумерован показано еще одно изобретение которое является альтернативным расчетом определения долготы. Ref. John Harrison Sea Clocks Механизм С ручным заводом Функции Минуты / Секунды / Часы / Фаза луны Размер корпуса 45 x 32 x 21 мм Запас хода 8 дней Особенности Астрономические часы / Настольные часы "watch club" Жуковка д.58 ⌚Швейцарские часы.⌚ Комиссионная продажа. TRADE-IN. ⏰🔛⌚ 💶СРОЧНЫЙ ВЫКУП.💵 Часы на заказ. 📳+7(925)6423805 whats app. ☎+7(495)008-28-88 678.ru
Views: 410 Watch Club
A fantastic grasshopper sea clock. It has an unique fusee movement. The clock is sitting on a black marble base with a protective glass dome. The clock has a famous grasshopper escapement. The double batons pendulums swing back and forth on each side of the clock each second, and it shows on a porcelain dial ring. The complete height of this clock is 17-1/4", 13-1/4" wide and 9-1/16" deep. The time shows on a 4" porcelain dial ring with a set of Roman numerals. There is a lot of motion on this clock and it certainly makes it standing out from the rest. The clock body is gold plated.
Views: 21675 zero distance
The Clock That Changed the World (BBC History of the World)
Of international scientific importance, the Harrison Clock is only one of only three precision pendulum clocks made by John Harrison and instrumental in solving the Longitude problem. The clock was made in 1727 with an amazing fully working wooden mechanism. Plans are in place to display it as part of an interpretive display at Leeds City Museum. With thanks to the BBC
Views: 357805 leedsmuseums
A Sea Clock
This clock is very loosely based on John Harrison's H1. So loosely in fact that it only retains the interlinked penulums (his were balances actually), and the grasshopper escapement. It is weight driven with a two minute electrical rewind. It has however the feel of his sea clock and so I decided to mount it on a rocking ship. The interlinked pendulums are largely independent of orientation and it keeps remarkably good time, at present about 30 seconds a day. For further details please see www.woodenclockspot.blogspot.co.uk
Views: 1889 MrParamount3
Harrison's Clocks
John Harrison loved making clocks. He did it so well that his clocks were used to solve one of the biggest headaches in navigation -- the Longitude Problem. I first learned about Harrison from Dava Sobel's excellent book, Longitude. Because Harrison's values are my values, I named my business after him. Here's a little more about the story.
Views: 2419 Harrison Metal
Harrison H1 clock
Replica of John Harrison marine chronometer clock to help calculate Longitude.. a long-sought after device for solving the problem of establishing the East-West position or longitude of a ship at sea, thus revolutionising and extending the possibility of safe long-distance sea travel in the Age of Sail.
Views: 18240 speleo2201
Harrison Third Timekeeper 19 years of work most accurate sea clock
Harrison Third Timekeeper 19 years of work was the most accurate sea clock Innovation no pendulum Royal Observatory Greenwich UK TilTul http://tiltul.com LinksYouWantToRemember CIMG0132 Harrison Third Timekeeper most accurate sea clock Innovation no pendulum
Views: 20 TilTuli
Amazingly accurate clock finally recognised after 300 years - Guinness World Records
A pendulum clock based on an 18th century theory dismissed at the time, has been recognised by Guinness World Records for its accuracy. Subscribe for more: http://bit.ly/subscribetoGWR Proving perhaps to have been too visionary for its times, “Clock B” has been awarded with a world record for most accurate mechanical clock with a pendulum swinging in free air, vindicating the vision of its original designer John Harrison Work on Clock B was started in 1975 by Martin Burgess, based on a design by 18th Century clockmaker Harrison, who is also famously renowned as the finder of longitude at sea. Welcome to the official Guinness World Records YouTube channel! If you're looking for videos featuring the world's tallest, shortest, fastest, longest, oldest and most incredible things on the planet, you're in the right place. LIKE us on Facebook: http://www.facebook.com/GuinnessWorldRecords FOLLOW us on Twitter: http://twitter.com/gwr Find out more: http://www.guinnessworldrecords.com/ Add us to your G+ circles: http://www.google.com/+guinnessworldrecords #GWR #GuinnessWorldRecords #worldrecord
Views: 73159 Guinness World Records
Royal Observatory Greenwich in UK
Royal Observatory Greenwich June 2016 This video clip was recorded during my family's visit to UK. In the video clip , the first experimental marine timekeeper made by John Harrison in Barrow-on Humber between 1730 and 1735. The clock is know as H1
Views: 3959 Nway Oo Ko
Harrison Birtwistle- Harrison's Clocks (Score)
These pieces were inspired by the Sobel book Longitude, about the painfully prolonged gestation of John Harrison's sea clocks, now preserved at Greenwich; and the link with Harrison Birtwistle's shared name. There are five substantial pieces, each starting with a rush of notes down to the bottom of the keyboard. In Clock I irregular contrary motion and staccato figures are deliberately out of phase. Next a mechanical fantasy with an alarm bell. Clock III variously combines six figures in pairs. Clock IV introduces each of its four sections by repeating the opening signal of the whole work. The last is a toccata with reversed delays between the hands, ending, as each piece does, 'because the clock-spring has broken down', as explained in Stephen Pruslin's helpful notes. Pf: I-IV: Nicolas Hodges V- Joanna MacGregor
Views: 1356 Utsyo Chakraborty
1737 Harrison Second Timekeeper most accurate sea clock Innovation no pendulum
1737 Harrison Second Timekeeper most accurate sea clock Innovation no pendulum Royal Observatory Greenwich UK TilTul http://tiltul.com LinksYouWantToRemember CIMG0131 1737 Harrison Second Timekeeper most accurate sea clock Innovation no pendulum
Views: 36 TilTuli
1736 Harrison First Timekeeper most accurate sea clock Innovation no pendulum
1736 Harrison First Timekeeper most accurate sea clock Innovation no pendulum Royal Observatory Greenwich UK TilTul http://tiltul.com LinksYouWantToRemember CIMG0130 1736 Harrison First Timekeeper most accurate sea clock Innovation no pendulum
Views: 50 TilTuli
Ships, Clocks & Stars: Assembling the H3 replica
How many people does it take to assemble a clock? For the replica of John Harrison’s H3, currently on display as part of Ships, Clocks & Stars: the Quest for Longitude, the answer is two master clockmakers. David Higgon and Sean Martin, from Charles Frodsham & Co, London, spent four days reassembling a thousand pieces to create the working model. 'Ships, Clocks & Stars: The Quest for Longitude' runs until 30 October 2016 at the AUSTRALIAN NATIONAL MARITIME MUSEUM, DARLING HARBOUR SYDNEY. BOOK TICKETS NOW AT http://www.anmm.gov.au/longitude KIDS & MEMBERS FREE (Kids FREE with paying adult. Excludes school and group bookings.) Video by Lights Camera Business video production, Sydney https://www.lightscamerabusiness.com.au/
H1 Sea Clock for iPhone & iPod Touch
H1 was John Harrison's first attempt to solve the Longitude problem for navigation at sea. It was completed in 1736. The top dial is Seconds, 1 revolution is 2 minutes. Left dial is minutes, 1 revolution is 2 hours. Right Dial is hours, 1 revolution is 24 hours. Bottom calendar dial represents 31 days for 1 revolution on this simulation. For the top three dials, the numbers increase from top to bottom on the right side of the dials and from bottom to top on the left side so you can read either end of the hands. (Sorry, the youtube video is kinda jerky) This is an earlier version of the app. Images of H1 © National Maritime Museum, Greenwich, London by kind permission of the Ministry of Defence Art Collection, London, used under license. http://www.iTalentProductions.com
Views: 3934 Gary Mayhak
Harrison Clock - H1
This is the original H1 clock made by John Harrison. Currently being renovated in the workshops at the Royal Observatory, Greenwich, London.
Views: 24375 Marlene Halliday
The Longitude Problem
The discovery of a way to measure longitude revolutionised long-distance sea travel forever, but the institution which made it happen has all but disappeared from memory. Now researchers led by Professor Simon Schaffer are launching a new project to remember the Board of Longitude and tell its remarkable story in full for the first time.
Views: 20731 Cambridge University
The Harrison Clock H1 replica by Norman Banham of Canberra
Canberra John Harrison "Norm Banham" watchmaker craftsman Heritage Horologist Australia ACT
Views: 2470 speleo2201
The Longitude Problem
The Longitude Problem has perplexed navigators and scientists for centuries. This is an exploration of the many solutions (good and bad) that have been tried throughout history. Help support videos like this: https://www.patreon.com/Qriosity Twitter & Website: https://twitter.com/QriosityVideos https://www.qriosity.org ____________________ All content used in this video is (1) public domain; (2) licensed under Creative Commons with attribution; (3) copyrighted material used in accordance with relevant Terms and Conditions; (4) used with express permission; or (5) original artwork. Content listed below was available under Creative Commons at the time of this video's publication. Creative Commons licenses are irrevocable. Only content licensed under CC BY-SA has been modified and all such modified versions of said content are hereby also licensed under CC BY-SA. No content licensed under CC BY-ND has been modified. All rights are hereby reserved for all original artwork used. The video as a whole is a collective work and therefore not subject to the share-alike license of any components used. All rights are hereby reserved for this video. It is prohibited to commercially use or distribute this video, or any parts of it, without express permission granted by Qriosity. It is also prohibited to re-upload this video onto social networking websites such as Facebook, video hosting websites (including YouTube) or elsewhere on the internet. Seriously, guys, freebooting is not cool. Music licensed under Creative Commons with attribution: • "Thatched Villagers" by Kevin MacLeod http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100720 Images licensed under Creative Commons with attribution via Flickr: • Ben Sutherland https://www.flickr.com/photos/bensutherland/6937524254 • Metadata Deluxe https://www.flickr.com/photos/[email protected]/6120139051 • Simon_sees https://www.flickr.com/photos/[email protected]/5620757621 • Snapshots of The Past https://www.flickr.com/photos/oldeyankee/5085763713 • NIAID (National Institute of Allergy and Infectious Diseases) https://www.flickr.com/photos/niaid/16578744517 Images licensed under Creative Commons with attribution via Wikimedia Commons: • Alvesgaspar https://commons.wikipedia.org/wiki/File:Cantino_planisphere_(1502).jpg • AndreasPraefcke https://commons.wikimedia.org/wiki/File:Hollywood_sign_2008.jpg • Bjørn Christian Tørrissen https://commons.wikimedia.org/wiki/File:Domestic_Dromedary_Merzouga.jpg • Blueshade https://commons.wikimedia.org/wiki/File:Earth-lighting-equinox_EN.png • Chen-Pan Liao https://commons.wikimedia.org/wiki/File:Northern_Hemisphere_Azimuthal_projections.svg • David Iliff https://commons.wikimedia.org/wiki/File:Clock_Tower_-_Palace_of_Westminster,_London_-_September_2006-2.jpg • Etxeko https://commons.wikimedia.org/wiki/File:Meuble_héraldique_Branche_arbre.svg • Haragayato https://commons.wikimedia.org/wiki/File:Safety_Pin.jpg • Hellerick https://commons.wikimedia.org/wiki/File:Division_of_the_Earth_into_Gauss-Krueger_zones_-_Globe.svg • Kjetil Bjørnsrud https://commons.wikimedia.org/wiki/File:Royalobs.jpg • Lidingo https://commons.wikimedia.org/wiki/File:Steering_wheel_ship_1.png • Loveless https://commons.wikimedia.org/wiki/File:Eratosthene.01.png • Matthead https://commons.wikipedia.org/wiki/File:Iohannes_Werner.jpg • Mikkelbg https://commons.wikimedia.org/wiki/File:Dive-sig-ok.jpg • Mu301 https://commons.wikipedia.org/wiki/File:Boston_Time-Ball.jpg • Nkansahrexford https://commons.wikipedia.org/wiki/File:Time_Ball_Tower_13.jpg • Orderinchaos https://commons.wikimedia.org/wiki/File:Newcastle_clock_tower_2.jpg • Rama https://commons.wikimedia.org/wiki/File:Soleil-Royal_mp3h9369.jpg • Saffron Blaze (www.mackenzie.co) https://commons.wikimedia.org/wiki/File:Edinburgh_Calton_Hill.jpg • Sage Ross https://commons.wikimedia.org/wiki/File:A_course_of_green_cefalexin_pills.jpg • Simplicius https://commons.wikimedia.org/wiki/File:John_Harrison_Uhrmacher.jpg • Strebe https://commons.wikimedia.org/wiki/File:Orthographic_projection_SW.jpg • Tau'olunga https://commons.wikimedia.org/wiki/File:Equinox-0.jpg https://commons.wikimedia.org/wiki/File:Equinox-20.jpg https://commons.wikimedia.org/wiki/File:North_season.jpg • Tomtheman5, Zscout370 https://commons.wikimedia.org/wiki/File:Flag_of_the_Philippines_-_cropped_sun.svg • Yakiv Gluck, Matsievsky https://commons.wikimedia.org/wiki/File:Biruni-russian.jpg For more information on CC BY-SA and CC BY-ND please see: https://creativecommons.org/licenses/by-sa/4.0/ https://creativecommons.org/licenses/by-sa/3.0/ https://creativecommons.org/licenses/by-nd/4.0/ https://creativecommons.org/licenses/by-nd/3.0/ © 2016 Qriosity
Views: 12305 Qriosity
John Harrison's wooden clocks - part 1
This video explains the origin of the 1714 Act that offered the 'Longitude Prize' and how the humble country carpenter John Harrison progressed from making simple domestic clocks to more sophisticated precision timekeepers.
Views: 41384 Peter Jordan
What IS Longitude? | Earth Lab
John Harrison goes in depth on how we measure longitude. Subscribe to Earth Lab for more fascinating science videos - http://bit.ly/SubscribeToEarthLab All the best Earth Lab videos http://bit.ly/EarthLabOriginals Best of BBC Earth videos http://bit.ly/TheBestOfBBCEarthVideos Professor Brian Cox is going in search of the best of British science. Introducing his science heroes, Brian visits the places where they made their discoveries, recreating their experiments and examining their legacy to their scientific descendants. Here at BBC Earth Lab we answer all your curious questions about science in the world around you. If there’s a question you have that we haven’t yet answered or an experiment you’d like us to try let us know in the comments on any of our videos and it could be answered by one of our Earth Lab experts. Want to share your views with the team behind BBC Earth and win prizes? Join our fan panel here: http://tinyurl.com/YouTube-BBCEarth-FanPanel This is a channel from BBC Studios who help fund new BBC programmes. Service information and feedback: https://www.bbcworldwide.com/ContactWizard
Views: 26649 BBC Earth Lab
John Harrison (1693 - 1776) was a carpenter turned watchmaker, who invented a reliable chronometer which enabled accurate navigation around the globe by such sailors as Captain James Cook.
Should we stop the Harrison clock?
The longcase clock at Nostell made by John Harrison has been keeping time steadily for 300 years. But now sometimes it stops. Should we replace worn parts or simply stop it to preserve its original state? Hear what Jonathan Betts (National Trust Advisor on Clocks and Watches) thinks and visit The Clock Stops exhibition at Nostell (25 March - 29 October 2017) to have your say.
Twin Pivot Grasshopper Escapement - invented by John Harrison
Four minute escape wheel No sliding friction, no wear, no lubrication Entry angle = 90 degrees Exit angle = 89.73 degrees Thank you, David Heskin. More information refer to: www.hsn161.com
Views: 35815 Ken Kuo
John Harrison | Making History Episode 01 | Global Entertainment
John Harrison | Making History Episode 01 | Global Entertainment John Harrison (3 April [O.S. 24 March] 1693– 24 March 1776) was a self-educated English carpenter and clockmaker who invented the marine chronometer, a long-sought after device for solving the problem of calculating longitude while at sea. His solution revolutionized navigation and greatly increased the safety of long-distance sea travel. The problem he solved was considered so important following the Scilly naval disaster of 1707 that the British Parliament offered financial rewards of up to £20,000 (equivalent to £2.84 million today) under the 1714 Longitude Act.[1] Harrison came 39th in the BBC's 2002 public poll of the 100 Greatest Britons. For more interesting videos, Subscribe to our channel and Enjoy free videos https://www.youtube.com/channel/UCYunm44gpvaVPRru-7hHAog?sub_confirmation=1
John Harrison's first timekeeper
This short film is from Editor David J. Eicher's 2013 England astronomy tour.
Views: 408 Astronomy magazine
Birtwistle's Clocks
Views: 7362 Jeroen de Boer
The Quest for Longitude: Ships, Clocks & Stars at Mystic Seaport
For centuries, sailors ventured out with little knowledge of where they were or which direction they were heading. Mystic Seaport’s new exhibit “Ships, Clocks & Stars: The Quest For Longitude” tells the story of an unlikely hero – a clockmaker, and a timepiece so precise it changed seafaring navigation forever. Mystic Seaport is the nation's leading maritime museum. Founded in 1929, the museum is home to four National Historic Landmark vessels, including the Charles W. Morgan, American's oldest commercial ship and the last wooden whaleship in the world. Mystic Seaport ranges across 17-acres on the Mystic Peninsula with 50 buildings and hands-on attractions, including, sailing classes, a million seafaring artifacts and historical photographs, Sabino, the oldest coal-powered steamboat in America, and a 250 year tradition of celebrating all things of the sea. From whaling history to wood carving and cooperage, Mystic Seaport is the place for those who love the sea and maritime history. Mystic Seaport is located one mile south of exit 90 off I-95 in Mystic, CT. Admission is $24 for adults and $15 for children ages 6-17. Museum members and children under 6 are admitted free. For more information visit www.mysticseaport.org View special offer for Mystic Seaport: http://bit.ly/1m3ZjBM
Views: 50536 Mystic Seaport
John Harrison's "H4" Timepiece
Finally, success! This is THE instrument used to discover Prime Meridian
Views: 7190 TheOxVideo
Harrison Clock 1
John Harrison was the first person to solve the longitude problem of navigation at sea. He spent 40 developing clocks that could keep accurate time at sea. Here is a video of his first version working. It's in the museum of the Royal Observatory at Greenwich, England
Views: 3 John Thomas
One of Harrison's Clocks at the Greenwich Observatory
John Harrison created ingenious clocks to solve the problem of navigators finding their longitude at sea.
Views: 93 Joshua Colwell
John Harrison H1 - Greenwich Observatory
Harrisons first Marine Chronometer/ Sea Clock.
Views: 222 wryyyy
The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time (1997)
Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time is a best-selling book by Dava Sobel about John Harrison, an 18th-century clockmaker who created the first clock (chronometer) sufficiently accurate to be used to determine longitude at sea—an important development in navigation. The book was made into a television series entitled Longitude. In 1998, The Illustrated Longitude was published, supplementing the earlier text with 180 images of characters, events, instruments, maps and publications. Determining longitude on land was fairly easy compared to the task at sea. A stable surface to work from, a comfortable location to live in while performing the work and the ability to repeat determinations over time made for great accuracy. Whatever could be discovered from solving the problem at sea would only improve the determination of longitude on land. Determining latitude was relatively easy in that it could be found from the altitude of the sun at noon with the aid of a table giving the sun's declination for the day.[2] For longitude, early ocean navigators had to rely on dead reckoning. This was inaccurate on long voyages out of sight of land and these voyages sometimes ended in tragedy as a result. In order to avoid problems with not knowing one's position accurately, navigators have, where possible, relied on taking advantage of their knowledge of latitude. They would sail to the latitude of their destination, turn toward their destination and follow a line of constant latitude. This was known as running down a westing (if westbound, easting otherwise).[3] This prevented a ship from taking the most direct route (a great circle) or a route with the most favourable winds and currents, extending the voyage by days or even weeks. This increased the likelihood of short rations,[4] scurvy or starvation leading to poor health or even death for members of the crew and resultant risk to the ship. Errors in navigation have also resulted in shipwrecks. Motivated by a number of maritime disasters attributable to serious errors in reckoning position at sea, particularly spectacular disasters such as the Scilly naval disaster of 1707 which took Admiral Sir Cloudesley Shovell and his fleet, the British government established the Board of Longitude in 1714. "The Discovery of the Longitude is of such Consequence to Great Britain for the safety of the Navy and Merchant Ships as well as for the improvement of Trade that for want thereof many Ships have been retarded in their voyages, and many lost..." and announced the Longitude Prize "for such person or persons as shall discover the Longitude." The prizes were to be awarded to the first person to demonstrate a practical method for determining the longitude of a ship at sea. Each prize, in increasing amounts, was for solutions of increasing accuracy. These prizes, worth millions of dollars in today's currency, motivated many to search for a solution. Britain was not alone in the desire to solve the problem. France's King Louis XIV founded the Académie Royale des Sciences in 1666. It was charged with, among a range of scientific activities, the improvement of maps and sailing charts and advancement of the science of navigation. From 1715, the Académie offered one of the two Prix Rouillés specifically for navigation.[5] Spain's Philip II offered a prize for the discovery of a solution to the problem of the longitude in 1567; Philip III increased the prize in 1598. Holland added to the effort with a prize offered in 1636.[6] Navigators and scientists in most European countries were aware of the problem and were involved in finding the solution. Due to the international effort in solving the problem and the scale of the enterprise, it represents one of the largest scientific endeavours in history. http://en.wikipedia.org/wiki/Longitude_%28book%29
Views: 25124 Remember This
John Harrison Clocks for Longitude from June 1998 in Greenwich, London, UK
Read more about these clocks at http://en.wikipedia.org/wiki/John_Harrison and in the book Longitude by Dava Sobel.
Views: 5615 franticvid
Views: 253 hendjim
John Harrison's third timekeeper
This short film is from Editor David J. Eicher's 2013 England astronomy tour
Views: 241 Astronomy magazine
John Harrison’s super accurate clock helped solve the longitude puzzle
John Harrison’s super accurate clock helped solve the longitude puzzle
Views: 40 NL News
John Harrison's H1 Clock  1735
Kept at the Royal Meteorological Observatory in Greenwich, UK. It still works! The first timepiece able to keep accurate time on a ship.
Views: 2873 Yak18pilot
Standard Sea Clock - 'HIS' on display in the window of Wempe NY Fifth Avenue
The Standard Sea clock was the first of the Sea clocks made by Sinclair Harding. The original design was conceived by Richard Good and styled by Mike Harding in the 1980's. In 1999 several modifications were made to the movement as part of Sinclair Harding's continuous bid to improve on every clock made. The main modification was the addition of a Chain driven Fusee, another of Harrison's inventions, which subsequently made improvements in the clocks timekeeping abilities -- important for a clock "Inspired by John Harrison". http://wempe3.reachlocal.net/bereich-usa.htm http://www.clockmakers.com/john_harrison_sea_clocks/standard_seaclocks.htm
Views: 2633 Michael Birken
History Day Documentary: The Marine Chronometer
State History Day Senior Group Documentary.
Views: 10724 Carter Green
John Harrison H1
Vid made at Royal Observatory Greenwich
Views: 5531 Dale Vito
Determine Longitude
This video demonstrates how to use observations of the sun combined with local and Greenwich time to determine longitude. An interesting project for anyone interested in navigation and the geometry of our relationship with the sun.
Views: 472791 ScienceOnline
Harrison's clocks
Royal Observatory, Greenwich UK
John Harrison's H3
Views: 209 numeratus

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