Charles Davis writes “from story at
The BBC:
Historic documents giving an insight into an 18th Century clockmaker’s struggle to be awarded the prize for measuring longitude have been bought by the National Maritime Museum.
Working class joiner John Harrison was ridiculed when he suggested a clock could be used to accurately measure a ship’s position at sea.
After 40 years of work, his H4 clock, tested in 1761, lost only five seconds in a period of just over six weeks – a remarkable accomplishment.
“
Recent Comments