Clockmaker John Harrison Vindicated 250 years after absurd claims



After a hundred day trail, the timepiece known as Clock B which has being sealed in a plastic box to prevent tempering has now being declared by Guinnese as the world most accurate mechanical clock with a pendulum swinging in free air.

The most important and intriguing thing about the clock, was that it was designed for over 250 years ago. The British clockmaker whose marine chronometer had revolutionized seafaring in the 18th century and a subject of longitude by Dava Sobel. when he claimed that he could make a pendulum timepiece that was accurate to within a second over a 100-day period triggered widespread ridicule and he was told it is not simple impossible, but now in time it  was possible and it has being made.

Harrison Decoded towards a perfect clock, observatory scientist revealed that a clock that had been built to clockmaker’s exact specification had run a 100 days period official test and lost only five-eight of a second in that period.

This was an extraordinary achievement and it completely vindicated Harrison who initially claimed he could make such a clock. Harrison  had all this while suffered ridicule and was told that the task was not simply possible, but the achievement  was made possible now with Harrison specification of the clock.
Harrison was awarded a god sum of money and he died a rich man, but before his death, he produced a book in which he named  some of his rivals and  claims he will make a time piece that can be more accurate than anyone they could build.

The book produced by Harrison was savagely criticized, and the London Review of English  and Foreign  Literature  describing it as one of the most unaccountable production we have ever met with. But his ideas was long forgotten until the 1970s when interst in a super-accurate pendulum was reawaken.

The artist and clockmaker Martin Burges tries to decipher Harrison’s plans, and in his second attempts he produced two versions of his great clock, where Clock B was the focus and attempts to make it to accuracy in the past year. McEvoy said “Essentially we have been fine-tuning the clock so that we can bring it to full potential and accuracy”

Worshipful Company of Clockmakers and the National Physical Laboratory carried out the observation of the clock last year and it showed that Harrison claims can be perfected to standard, and this led to this year final test that started January 6th when the clock was sealed in a plastic box, and at the start of the test the clock showed it was running at quarter of a second behind Greenwich Mean Time and at the end of the trail it was noticed that the clock read 7/8ths of a second behind GMT and has lost 5/8th of  second in 100-day trail, thus Harrison's remarkable design can now be seen for what it was “a master piece”  

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