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Directors: II. Ussher, 1774.
J. Brinkley, 1792.
W. B. Hamilton, 1827.
Kobert S. Ball, Astronomer Boyal of Ireland , 1875.
Dunsink Observatory belongs to Trinity College, Dublin . It wasfounded in 1774, by means of a legacy left for the purpose by F. An-drews. It is built in the midst of a vast park at Dunsink, 3f miles (6kilometers) northwest of Dublin , and was not finished until 1792. Itis a structure of three stories, surmounted by a revolving dome. Anannual visitation of the Observatory is held every summer by the boardof Trinity College .
Instruments :
(a) Meridian circle : Makers, Pistor & Martins ; diameter of circles,36 inches; divided to 2'; read by 8 microscopes to 1"; aperture of ob-jective, 6.4 inches; magnifying power ordinarily employed, 180 diam-eters.
(b) Meridian transit instruments: One, made by Bamsden; aperture,4 inches; not in use. ( V) One with reversible circle by Bamsden &Berge ; object-glass, 3 inches; diameter of circle, 8 feet; 3 micrometers;not in use.
(c) Equatorial instruments: One; makers, Cauchoix object-glass,Grubb mounting; aperture of objective, Ilf inches; magnifying powersof eye-pieces, 300; is generally used, (c') One of 4 inches aperture;English. equatorial by Tulley. (?) Hardly ever used.
(d) Spectroscopes: One of Browning’s 2-prism spectroscopes; andone of Yogel’s small-star spectroscopes.
(/) Chronograph: Maker, Grubb; two barrels and controlled clock.
(g) Clocks: One mean time; maker, Booth, of Dublin ; one sidereal;maker, Dent, London .
(h) Chronometer: Sidereal ; maker, M’Master.
( i) Miscellaneous: The mean-time clock controls by electricity theclocks in the port and docks board and Trinity College , the distancebeing about 5 miles from Dunsink.
Dun Echt (Aberdeen), Scotland .
Longitude from Greenwich, 9 m 40 s W.
Latitude, 57° 9' 36" H.
Authority for longitude: Ordnance Survey ; for latitude; observationswith a Simms’s alt azimuth. The transit circle confirms the re-sult within a fraction of a second.
Astronomer .- Balpii Copeland.
Dun Echt Observatory, the property of the Earl op Crawfordand Balcarres (late Lord Lindsay), is on the estate of Duu Echt,about 13 miles west of Aberdeen .