In 1831 the
system of correction of broken transits was improved: the errors of
assumed R.A. of Fundamental Stars were exhibited: Mean Solar Time was
obtained from Sidereal Time by time of Transit of [Symbol: Aries]
(computed by myself): the method of computing occultations was
improved. In 1832 the small Equatoreal was erected, and was soon
employed in observations of the elongation of the 4th Satellite of
Jupiter for determining the mass of Jupiter. The Mural Circle was
erected at the end of the year, but not used. The calculation of
R.A. of Fundamental Stars was made homogeneously with the others:
separate results of all were included in ledgers: a star-catalogue was
formed: all as to the present time (1871). With the Equatoreal the
difference of N.P.D. of Mars and stars was observed.
"With the beginning of 1833 the Mural Circle was established at work,
a second assistant (Mr Glaisher) was appointed, and the Observatory
might be considered complete. I made experiments on the graduations of
the Circle. I detected and was annoyed by the R--D. I determined the
latitude. I exhibited the separate results for N.P.D. of stars in
ledger, and their means in Catalogue. I investigated from my
observations the place of equinox and the obliquity of the ecliptic.
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