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Greenwich Observatory), who have also pre-
dicted its next perihelion passage for April
8th to 16th, 1910, and have traced back its
history still farther, to 240 B.C.
Already, in November, 1907, the Astronomer
Royal was trying to catch it by the aid of
photography.
FOOTNOTES:
[1] Born 1736; died 1813.
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