John Harrison,British clockmaker
Bildnummer 11829203
| John Harrison (1693-1776),British inventor. With so many ships being lost due to navigational errors,the British Government in 1713 put up a prize of 20,000 pounds for the first person to accurately calculate longitude aboard a ship. Harrison decided to build a chronometer that could work on a moving ship and allow measurement of time differences,and hence longitude,around the world. He introduced a number of innovations,including bimetallic strips to allow for temperature differences,meaning that his last chronometer,no bigger than a large watch,was more accurate at sea than any other clock was on land. Published in a book in 1849 | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Bernard, George |
| Bildgröße: | 3476 px × 5242 px |
| Modell-Rechte: | nicht erforderlich |
| Eigentums-Rechte: | nicht erforderlich |
| Restrictions: | - |
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