Abstract
January 9, 1729.—while holding the Savilian professorship of astronomy at Oxford, Bradley attempted to detect the annual parallax of the fixed stars. Hooke at Gresham College, and Molyneux at Kew, attacked the same problem, and Bradley collaborated with the latter. He then erected a zenith sector at Wanstead. The observed movement of the stars for a time baffled him, but after much thought he was able to explain what he saw by his important discovery of the aberration of light; a discovery which was communicated to the Royal Society on Jan. 9, 1729, in the form of a letter from Bradley to Halley. January 10, 1849.—Some of the earliest experiments in submarine telegraphy were made by. Wheatstone, S6mmering, Morse, and Colt, but it was the introduction of the use of guttapercha by Werner Siemens which made submarine cables practicable. On Jan. 10, 1849, C. V. Walker, of the South-Eastern Railway, laid two miles of cable in the Channel off Folkestone, and by this and a land line of 83 miles communicated from a ship with London. There are now more than 300,000 miles of submarine cables in use.
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S., E. Calendar of Discovery and Invention. Nature 119, 70 (1927). https://doi.org/10.1038/119070a0
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DOI: https://doi.org/10.1038/119070a0