Halleys Comet An Evening Discourse to the British Association At Their Meeting
Halleys Comet An Evening Discourse to the British Association At Their Meeting
Turner, H. H. (Herbert Hall), 1861-1930
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But in the seventeenth century the chronometer had not been invented ; and the alternative method of * lunar distances ' (lately superseded by that of the chronometer) was not available owing to lack of knowledge of the moon's movements. The problem of finding longitude was one of immense difficulty and immense importance ; and any hope of solving it was eagerly caught at. It seemed possible that the deviation of the compass from true north might be a guide ; for this deviation varies with the ...longitude. Accordingly Halley set out on a long voyage to investigate the manner in which it does vary with longitude. It tells us something of his extraordinary powers that he was actually put in command of one of H. M. Ships, the pink Paramour, and commanded her through all the troubles of a long voyage, including mutiny of his first lieutenant. His commission is still on the Admiralty minutes, and runs as follows : (From Speculum Hartwellianum, p. 9. ) INSTRUCTIONS TO CAPTAIN EDMUND HALLEY, COMMANDER OF His MAJESTY'S PINK, THE PARAMOUR.
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