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The Troughton equatorial, 2-inch aperture, 3-feet focal length, arrived in December 1795 and was mounted, in the English style, under the south dome on two stone piers resting on a massive pillar, round which the staircase of the dwelling house winds. There is no polar axis, but the right ascension circle, 4 feet in diameter, is attached to the polar pivots by four stays. The declination circle is of the same size and is similarly attached by stays to two pivots, which turn in Y's fastened to the right ascension circle. A description of the instrument appears in Dr. Rees's Cyclopaedia.
The dome also houses an astronomical clock by Crosthwaite which is fixed to the stone pier.
Last Revised: 2015 January 8th