14th, but not printed, dipping-needle
problems, curve described round three centres of force, barometer
observations, theory of the Figure of the Earth with variable density,
and effect on the Moon, correction to the Madras pendulum, wedge with
friction, spots seen in my eyes, density of rays near a caustic. In
this term I accomplished the preparation of a volume of Mathematical
Tracts on subjects which, either from their absolute deficiency in the
University or from the unreadable form in which they had been
presented, appeared to be wanted. The subjects of my Tracts were,
Lunar Theory (begun Oct. 26th, finished Nov. 1st), Figure of the Earth
(1st part finished Nov. 18th), Precession and Nutation (my old MS. put
in order), and the Calculus of Variations. I applied, as is frequently
done, to the Syndicate of the University Press for assistance in
publishing the work; and they agreed to give me paper and printing for
500 copies. This notice was received from Professor Turton on
Nov. 29th, 1825. It was probably also in this year that I drew up an
imperfect 'Review' of Coddington's Optics, a work which deserved
severe censure: my review was never finished.
"In the Long Vacation at Keswick I had six pupils at _L42_ each.
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