to act on the refractory bolt. But by this time it was getting
dark and the men were leaving the dockyard, so I left, arranging that
what they could do in preparation for me might be done in good time
to-morrow morning.

1847

"On Nov. 13th I circulated an Address, proposing to discontinue the
use of the Zenith Tube, because it had been found by a long course of
comparative trials that the Zenith Tube was not more accurate than the
Mural Circle. The Address stated that 'This want of superior
efficiency of the Zenith Tube (which, considered in reference to the
expectations that had been formed of its accuracy, must be estimated
as a positive failure) is probably due to two circumstances. One is,
the use of a plumb-line; which appears to be affected with various
ill-understood causes of unsteadiness. The other is, the insuperable
difficulty of ventilating the room in which the instrument is
mounted.'--On December 20th I circulated an Address, proposing a
Transit Circle, with telescope of 8 inches aperture. The Address
states as follows: 'The clear aperture of the Object-Glass of our
Transit Instrument is very nearly 5 inches, that of our Mural Circle
is very nearly 4 inches.'--I had been requested by the Master-General
of Ordnance (I think) to examine Candidates for a Mastership in
Woolwich Academy, and I was employed on it in February and March, in
conjunction with Prof. Christie.--In January I applied to Lord
Auckland for money-assistance to make an astronomical journey on the
Continent, but he refused.--On Mar. 19th Sir James South addressed to
the Admiralty a formal complaint against me for not observing with the
astronomical instruments: on Mar. 31st I was triumphantly acquitted by
the Admiralty.--In June I was requested by the Commissioners of
Railways to act as President of a Commission on Iron Bridges
(suggested by the fall of the bridge at Chester). Lord Auckland
objected to it, and I was not sorry to be spared the trouble of
it.--In December I was requested, and undertook to prepare the
Astronomical part of the Scientific Manual for Naval Officers.--On
Sept. 24th occurred a very remarkable Magnetic Storm, to which there
had been nothing comparable before. Mr Glaisher had it observed by eye
extremely well, and I printed and circulated a paper concerning
it.--Hansen, stimulated by the Lunar Reductions, discovered two long
inequalities in the motion of the Moon, produced by the