The results for the whole period agree
entirely, in their general spirit, with those for the year 1852 cited
in the last Report. The greatest difference between the merits of
Burckhardt's and Hansen's Tables appears in the Meridional Longitudes
1855, when the proportion of the sum of squares of errors is as 31
(Burckhardt) to 2 (Hansen). The nearest approach is in the Altazimuth
Latitudes 1854, when the proportion of the sum of squares of errors is
as 12 (Burckhardt) to 5 (Hansen).'--A special Address to the Members
of the Board of Visitors has reference to the proposals of M. Struve
for (amongst other matters) the improved determination of the
longitude of Valencia, and the galvanic determination of the extreme
Eastern Station of the British triangles.--On Sept. 13th I circulated
amongst the Visitors my Remarks on a Paper entitled 'On the Polar
Distances of the Greenwich Transit-Circle, by A. Marth,' printed in
the Astronomische Nachrichten; the Paper by Mr Marth was an elaborate
attack on the Greenwich methods of observation, and my Remarks were a
detailed refutation of his statements.--On Oct. 20th I made enquiry of
Sabine as to the advantage of keeping up magnetic observations. On
Oct.
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