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Keywords: First Voyage Round The World Conjunction.png d is intercepted by the moon c for those who are at a and not for those who are at b for whom it was intercepted when the moon was at e In principle this can be used to determine the difference of longitude of a and b 1874 http //archive org/details/firstvoyageround00piga Henry Edward John Stanley Baron Stanley 1827-1903 PD-old-auto-1923 1903 The First Voyage round the World by Magellan |