GSC) EEPORTS OF ASTRONOMICAL OBSERVATORIES. 



LAND iii<=1875-187G, and taken up by Mr. Dreyer in September 1878), 

 were finisbed iu tbe summer 1880, eacb star beiug observed four times 

 or oftener. The reductions to tbe epocb 1875.0 were nearly finisbed h\ 

 tbe end of tbe year. 



Tbe soutb equatorial bas been employed entirely in observations for 

 annual i^arallax by Dr. Ball. During 1880 a series for Groombridge 

 1G18 was completed, and from tbe distances of + 50<^, 1724, a parallax of 

 + 0". 3196 ± .052 bas been concluded ; for Gr. 1G18 a series for P III 

 242, recommended by Struve (M.N. vol. xx, p. 8), gives a parallax of 

 — 0".045 ± 0".070 (M.K, i^ovember, 1880). A series forScbj. 249 {a) 

 (red stars) bas been completed, but not reduced, and a series for w 

 Cepbei and £ 2480 bave been commenced. Tbe sweeping observations 

 described in Dunsink Observations, Part III, bave also been continued. 

 Work proposed for the coMma year (1881): 



Tbe meridian circle is proposed to be employed in a reobservatiou of 

 ArGtELANDER's soutbern zones, commencing witb tbe zone — 15° to 

 — 20'^, and extending jjerbaps a few degrees more soutb if it appears 

 practicable. 



Tbe equatorial is i)ioposed to be employed in a continuation of the 

 parallax observations, mucb of wbicb work is at present in bands. 

 Principal publications of the observatory: 



EOBERT S. Ball: Elements of Astronomy, London, 1 vol., 459 p. 



EOBERT S. Ball : On tbe Parallax of P III 242. M.N., November, 

 1880. 



J. L. E. Dreyer: A record of tbe progress of astronomy during tbe 

 year 1879. Proceedings of tbe Royal Dublin Society. 



Dun Echt, Scotland. 

 Private Observatory. 



Longitude from Greenwicb, d"^ 40^ W. 



Latitude, 57° 9' 36" N. 



Authority for longitude: Ordnance Survey; for latitude, observa- 

 tions witb a SiMMS alt-azimutb. Tbe transit circle confirms tbe result 

 witbin a fraction of a second. 



Astronomer : Ralph Corel and. Ph. D. 



Assistant : J. G. LoHSE. 



Computer : H. J. Carpenter. 



General mechanic : T. Kirkwood. 



Messenger and meteorology reader : J. McPherson. 



Dun Ecbt Observatory, tbe property of tbe Earl of Crawford ami 

 Balearres (late Lord Lindsay), is on tbe estate of Dun Ecbt, about 13 

 miles west of Aberdeen. 



Height above tbe sea, 464 feet to cistern of standard barometer. 



