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John Harrison
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John Harrison was an English joiner and clockmaker who invented the marine chronometer, a long-sought-after device for solving the problem of how to calculate longitude while at sea.
Portrait by Thomas King, 1767
Portrait by Thomas King, 1767
Henry Sully's clock (Fig.1) with escapement (Fig.2) and shipboard gimbaled suspension mechanism (Fig.7)
Henry Sully's clock (Fig.1) with escapement (Fig.2) and shipboard gimbaled suspension mechanism (Fig.7)
Harrison's first sea clock, the H1
Harrison's first sea clock, the H1
Harrison's second sea clock, the H2
Harrison's second sea clock, the H2
Larcum Kendall
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Larcum Kendall was a watchmaker from Oxfordshire, who was active in London.
John Harrison
…had to come out of this). He became the equivalent of a multi-millionaire (in today's terms) in the final decade of his life. Captain James Cook used K1, a copy of H4, on his second and third voyages, having used the lunar distance method on his first voyage. K1 was made by Larcum Kendall, who had been…
A blue plaque to Larcum Kendall in Charlbury, Oxfordshire
A blue plaque to Larcum Kendall in Charlbury, Oxfordshire