With regard to the photoheliographs it
is proposed to make trial of a plan proposed by M. Janssen, for
numerous photographs of Venus when very near to the Sun's limb. On
Apr. 26th the engaging of photographic teachers was sanctioned.
Observers were selected and engaged. A working model of the
Transit was prepared, and the use of De La Rue's Scale was
practised. There was some hostile criticism of the stations selected
for the observation of the Transit, which necessitated a formal
reply.--Reference is made to the increase of facilities for making
magnetical and meteorological observations. The inevitable result of
it is, that observations are produced in numbers so great that
complete reduction becomes almost impossible. The labour of reduction
is very great, and it is concluded that, of the enormous number of
meteorological observations now made at numerous observatories, very
few can ever possess the smallest utility.--Referring to my Numerical
Lunar Theory: on June 30th, 1873, a theory was formed, nearly but not
perfectly complete. Numerical development of powers of a/r and
r/a. Factors of corrections to Delaunay first attempted, but entirely
in numerical form."--In March of this year Airy was consulted by Mr
W.
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