IELTS READING – Timekeeper 2 Invention of Marine Chronometer S55AT1


Timekeeper 2 Invention of Marine Chronometer

A. It was, as Dava Sobel has described a phenomenon: ‘the greatest scientific problem of the age’. The reality was that in the 18th century no one had ever made a clock that could suffer the great rolling and pitching of a ship and the large changes in temperature whilst still keeping time accurately enough to be of any use. Indeed, most of the scientific community thought such clock impossibility. Knowing one’s position on the earth requires two very simple but essential coordinates; rather like using a street map where one thinks in terms of how far one is up/down and how far side to side.

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