Autobiography of Sir George Biddell AiryAiry, George Biddell
Science
Autobiography of Sir George Biddell Airy
Airy, George Biddell
Airy, George Biddell, 1801-1892; Astronomers -- Great Britain -- Biography; Autobiographies; Royal Greenwich Observatory
I must, however, confess that,
in viewing the capricious forms of the photographic curves, my mind is
entirely bewildered, and I sometimes doubt the possibility of
extracting from them anything whatever which can be considered
trustworthy.'--Great progress had been made with the distribution of
time. 'The same Normal Clock maintains in sympathetic movement the
large clock at the entrance gate, two other clocks in the Observatory,
and a clock at the London Bridge Terminus of the South-Eastern
Railway.... It sends galvanic signals every day along all the
principal railways diverging from London. It drops the Greenwich Ball,
and the Ball on the Offices of the Electric Telegraph Company in the
Strand;... All these various effects are produced without sensible
error of time; and I cannot but feel a satisfaction in thinking that
the Royal Observatory is thus quietly contributing to the punctuality
of business through a large portion of this busy country. I have the
satisfaction of stating to the Visitors that the Lords Commissioners
of the Admiralty have decided on the erection of a Time-Signal Ball at
Deal, for the use of the shipping in the Downs, to be dropped every
day by a galvanic current from the Royal Observatory. The construction
of the apparatus is entrusted to me. Probably there is no roadstead in
the world in which the knowledge of true time is so important.'--The
Report includes an account of the determination of the Longitude of
Cambridge Observatory by means of galvanic signals, which appear to
have been perfectly successful.--Under the head of General Remarks the
following passage appears: 'The system of combining the labour of
unattached computers with that of attached Assistants tends materially
to strengthen our powers in everything relating to computation. We
find also, among the young persons who are engaged merely to serve as
computers, a most laudable ambition to distinguish themselves as
observers; and thus we are always prepared to undertake any
observations which may be required, although necessarily by an
expenditure of strength which would usually be employed on some other
work.'--Considerable work was undertaken in preparing a new set of
maps of our buildings and grounds.--On Apr. 23rd there was a small
fire in the magnetic observatory, which did little mischief.--In
December I wrote my description of the Transit Circle.--Lieut.
Stratford, the Editor of the Nautical Almanac, died, and
there was some competition for the office. I was willing to take
it at a low rate, for the addition to my salary: Mr Main--and I think
Mr Glaisher--were desirous of exchanging to it: Prof. Adams was
anxious for it. The Admiralty made the excellent choice of Mr
Hind.--In October Faraday and I, at Lothbury, witnessed some
remarkable experiments by Mr Latimer Clark on a galvanic current
carried four times to and from Manchester by subterranean wires (more
than 2000 miles) shewing the retardation of visible currents (at their
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