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an old man, he started afresh, and left be-
hind him a catalogue of 1,500 stars.
Flamsteed began his duties at Green-
wich Observatory, as first Astronomer Royal,
in 1676, with very poor instruments. In
ˆ
1683 he put up a mural arc of 140A, and in
1689 a better one, seventy-nine inches ra-
dius. He conducted his measurements with
great skill, and introduced new methods to
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