"
1857
"In the Report to the Visitors, when on the subject of the Altazimuth,
the following paragraph occurs: 'I alluded in a preceding section to
the cutting away of a very small portion of one of the rays of the
three-armed pier which carries the Altazimuth. The quality of the
brickwork is the best that I have ever seen, and not a single brick
was disturbed beyond those actually removed. Yet the effect was to
give the Altazimuth an inclination of about 23". This inclination
evidently depends on the elasticity of the brickwork.'--With reference
to the new S.E. Equatoreal the Report states that 'The support of the
north or upper end of the polar axis has been received, and is planted
within the walls of the building in a position convenient for raising
it to its ultimate destination. It is one piece of cast-iron, and
weighs nearly 5 tons.'--Small changes as previously mentioned had been
noticed with regard to the Zero of Azimuth of the Transit Circle, and
the Report states that 'In regard to the Azimuth of the Transit
Circle, and the Azimuth of its Collimator, Mr Main has brought
together the results of several years, and the following law appears
to hold.
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