Very great care was taken on both sides, for the adjustments of
the instruments. The resulting difference of longitude, 9m. 20.63s.,
is probably very accurate. It is less by nearly 1s. of time than that
determined in 1825 by rocket-signals, under the superintendance of Sir
John Herschel and Col. Sabine. The time occupied by the passage of the
galvanic current appears to be 1/12th of a second."--With regard to
the Pendulum Experiments in the Harton Colliery, after mentioning that
personal assistance had been sought and obtained from the
Observatories of Cambridge, Oxford, Durham, and Red Hill, the Report
states that "The experiments appear to have been in every point
successful, shewing beyond doubt that gravity is increased at the
depth of 1260 feet by 1/10000th part. I trust that this combination
may prove a valuable precedent for future associations of the
different Observatories of the kingdom, when objects requiring
extensive personal organization shall present themselves."--On
Oct. 18th the Astronomer Royal printed an Address to the Individual
Members of the Board of Visitors on the subject of a large new
Equatoreal for the Observatory. After a brief statement of the
existing equipment of the Observatory in respect of equatoreal
instruments, the Address continues thus: "It is known to the Visitors
that I have uniformly objected to any luxury of extrameridional
apparatus, which would materially divert us from a steady adherence to
the meridional system which both reason and tradition have engrafted
on this Observatory.
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