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the earth within 15,000,000 miles at rare
intervals, and, with the aid of photogra-
phy, will certainly give us the best result.
A large number of observatories combined
to observe the opposition of 1900. Their
results are not yet completely reduced, but
the best value deduced so far for the parallax[6]
ˆ
is 8”.807 A l 0”.0028.[7]
FOOTNOTES:
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