(AGI) Boston, July 5 - Hurricane Arthur is heading northeast asit continues to lose power. The first storm of the U.S.hurricane season advances at a speed of 50 kilometres per houralong the North American east coast. The eye of the hurricanehas reached a point off the coast of Chatham, Massachusetts.Earlier it was reduced from category 2 to category 1 on thefive-level Saffir-Simpson scale. . .