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Ko Hummel

Ko Hummel club

Posted: 24 Jun 2021

Taken: 30 Apr 2012

10 favorites     2 comments    92 visits

1/60 • f/4.0 • 28.0 mm • ISO 400 •

Canon EOS 400D DIGITAL

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Längengrad: Harrison's clock H1

Längengrad: Harrison's clock H1
Seen in Royal Observatory Greenwich.

Dava Sobel 's book (with William J.H. Andrewes), Longitude, an illustrated edition gives an excellent description of the search for accurate timekeeping which was of utmost importance for navigation at sea

Petar Bojić, Fred Fouarge, Erhard Bernstein, LotharW and 6 other people have particularly liked this photo

Comments
 tiabunna
tiabunna club
Fascinating, I understand that Capt Cook had one of these when he did his Pacific exploration.
2 years ago.
Ko Hummel club has replied to tiabunna club
No he didn't the H1 was tested in 1736 during a voyage to Lisbon. The H4 was tested during a voyage to Jamaica in 1764. Capt.Cook used a precise copy of the H4 named K1 with him on his voyage in 1768/69 during which he also intended to observe the Venus transition
2 years ago. Edited 2 years ago.

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