Khác biệt giữa bản sửa đổi của “John Harrison”

==Tham khảo==
{{tham khảo|2}}
== External links ==
 
{{Commons|John Harrison}}
*[http://www.rmg.co.uk/explore/astronomy-and-time/time-facts/harrison John Harrison and the Longitude Problem, at the National Maritime Museum site]
*[http://www.pbs.org/wgbh/nova/longitude/ PBS Nova Online: ''Lost at Sea, the Search for Longitude'']
*[http://www.lucytune.com John 'Longitude' Harrison and musical tuning]
*[https://web.archive.org/web/20081219102103/http://www.nmm.ac.uk/upload/pdf/Gould-Harrison-longitude-JBetts.pdf Excerpt from: Time Restored: The Story of the Harrison Timekeepers and R.T. Gould, 'The Man who Knew (almost) Everything']
*[http://www.telegraph.co.uk/news/uknews/1510333/Clock-from-1776-just-goes-on-and-on.html UK Telegraph: 'Clock from 1776 just goes on and on']
*[http://www.independent.co.uk/news/science/longitude-pioneer-was-not-a-lone-genius-1693503.html Andrew Johnson, ''Longitude pioneer was not a 'lone genius','' The Independent, 31 May 2009]
*[http://www.thepirateking.com/bios/harrison_john.htm Excellent accounting of John Harrison and his H1,H2,H3 Achievements]
*[http://www.bbc.co.uk/ahistoryoftheworld/objects/arSAQ-UETSOyftkNWZTpVQ Harrison's precision pendulum-clock No. 2, 1727, on the BBC's "A History of the World" website]
*[http://secretlivesofobjects.blogspot.com/2010/04/more-than-just-pretty-tick-tock-clock.html Leeds Museums and Galleries "Secret Life of Objects" blog, John Harrison's precision pendulum-clock No. 2]
*[http://www.booknotes.org/Watch/116077-1/Dava+Sobel.aspx ''Booknotes'' interview with Dava Sobel on ''Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time'', January 17, 1999.]
*[http://cudl.lib.cam.ac.uk/view/MS-H-17809 Account of John Harrison and his chronometer] at [[Cambridge Digital Library]]
*[https://www.theatlantic.com/technology/archive/2016/01/pendulum-clock-john-harrison/424614/ Building an Impossible Clock] Shayla Love, Jan 19, 2016, ''The Atlantic''
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