Works, &c.) about the bells of the Westminster
Clock; also about the smoky chimneys of the various apartments of the
Palace. On Apr. 21st I made my Report on the clock and bells, 20
foolscap pages. I employed a professional musician to examine the
tones of the bells.--In November I was writing my book on Probable
Errors, &c.--I was engaged on the Tides of Kurrachee and Bombay.--The
first examination of Navy telescopes was made for the Admiralty.
--Hoch's Paper on Aberration appeared in the Astronomische
Nachrichten. This (with others) led to the construction of the
water-telescope several years later.--In September I wrote in the
Athenaeum against a notion of Sir H. James on the effect of an
upheaval of a mountain in changing the Earth's axis. In October I had
drawn up a list of days for a possible evagation of the Earth's poles:
but apparently nothing was done upon them.

"In this year I was a good deal occupied for the Lighthouse
Commission. On Feb. 21st Admiral Hamilton (chairman) applied to me for
assistance. In April I went to Chance's Factory in Birmingham on this
business. In May I made my report on the Start Lighthouse, after
inspection with the Commission. In June, with my son Hubert, I visited
the Whitby Lighthouses, and discovered a fault of a singular kind
which most materially diminished their power. This discovery led to a
general examination of lighthouses by the Trinity Board, to a
modification of many, and to a general improvement of system. On June
25th I reported on the Lights at Calais, Cap de Valde, Grisnez, South
Foreland, and North Foreland. In August I had been to the North
Foreland again, and in September to Calais and the Cap d'Ailly. In
October I went with my son Hubert to Aberdeen to see the Girdleness
Lighthouse. On Nov. 10th I made a General Report.

"This was the year of the great total solar eclipse visible in
Spain. At my representation, the Admiralty placed at my command the
large steamship 'Himalaya' to carry about 60 astronomers, British and
Foreign. Some were landed at Santander: I with many at Bilbao. The
Eclipse was fairly well observed: I personally did not do my part
well. The most important were Mr De La Rue's photographic operations.
At Greenwich I had arranged a very careful series of observations with
the Great Equatoreal, which were fully carried out."

The eclipse expedition to Spain, shortly referred to above, was most
interesting, not merely from the importance of the