sands.

"The Mural Circle was now nearly ready in all respects, and it was
known that another Assistant would be required. Mr Richardson (one of
the Assistants of Greenwich Observatory) and Mr Simms recommended to
me Mr Glaisher, who was soon after appointed, and subsequently became
an Assistant at Greenwich.--On Dec. 24th I have a letter from Bessel
(the first I believe). I think that I had written to him about a
general reduction of the Greenwich Planetary Observations, using his
Tabulae Regiomontanae as basis, and that this was his reply approving
of it."

1833

"On Jan. 4th 1833 my daughter Elizabeth was born.--I prepared an
examination paper for Smith's Prizes as usual.--On Jan. 5th I received
notice from Simms that he had received payment (_L1050_) for the Mural
Circle from the Vice-Chancellor. About this time the Circle was
completely made serviceable, and I (with Mr Glaisher as Assistant)
immediately began its use. A puzzling apparent defect in the circle
(exhibiting itself by the discordance of zenith points obtained by
reflection observations on opposite sides of the zenith) shewed itself
very early. On Feb. 4th I have letters about it from Sheepshanks and
Simms.--On Jan. 17th I received notice from F. Baily that the
Astronomical Society had awarded me their Medal for my long inequality
of Venus and the Earth: on Feb. 7th I went to London, I suppose to
receive the Medal.--I also inspected Sir J. South's telescope, then
becoming a matter of litigation, and visited Mr Herschel at Slough: on
Feb. 12th I wrote to Sir J. South about the support of the
instrument, hoping to remove one of the difficulties in the
litigation; but it produced no effect.--Herschel wrote to me, from
Poisson, that Pontecoulant had verified my Long Inequality.

"Mar. 12th is the date of the Preface to my 1832 volume of
Observations: it was of course distributed a few weeks later.--In my
Report on Astronomy I had indicated the Mass of Jupiter as a subject
requiring fresh investigation. During the last winter I had well
employed the Equatoreal in observing elongations in R.A. of the 4th
Satellite. To make these available it was necessary to work up the
theory carefully, in which I discovered some remarkable errors of
Laplace. Some of these, for verification, I submitted to Mr Lubbock,
who entirely agreed with me. The date of my first calculations of the
Mass of Jupiter is Mar. 1st: and shortly after tha