PltOGKESS OF ASTKONOMY FOR 1891 AND 1«92. 727 



Coi'ENllAGEN: Xielfien. — M. Victor ^Nielsen at his lirivate obseiva- 

 t(»iy has a 7i inch refractor by lleint'eldcr and Ilertel, the objective of 

 -leiia ghiss. The work has been chielly upon the moon. 



Croweorougii IIiLL: Roberts. — Mr. Isaac lloberts' new observatory 

 is one of the highest points in the south of l^^ni^land, 780 feet al)()ve 

 sea level. The heniispliericnl dome has two slits to effect thoroui^h ven- 

 tihition. Phot<»gra])]is of stais, ]>lanets, nebnlic, and clusrcrs, A plio 

 to,uraphic search has been made for a trans-Keptnnian planet. 



Dakota AaRicuLTUBAL College (Brookings, Dakota.) — FoimcU'd 

 in 1801; equipment, 5-inch cfjuatorial. 2-inch transit, clock and clirono 

 graph. 



Denver. — See Chamberlin. 



Dresden: Dr. B. ran Exgelhardt. — Observations of comets, ncbuhc 

 and asteroids, and mi(;romctric measures of IJradley stars. 



Dudley: Boss. — Miss Catherine Wolfe Bruce, of New York city, 

 who is already known for her muniticent gifts in aid of astronomy, has 

 given 82.5,000 to the Dudley Observatory for the increase of its perma 

 nent endowment. From various sources the additional sum of #31,700 

 has been secured to defray the cost (►f rebuilding the observatory on a 

 new site and of furnishing it with anew e(iuatorialof 12inchesaperture, to- 

 gether with other improvements in its equipment. The cost of the 

 telescope is provided for by Eobert C. and Charles L. Pruyn; it is to 

 be of the most approved modern construction. The cost of re-estab- 

 lishing the Olcott meridian circle (8 inches aperture), c<mstructed 

 by Pistor and Martins, of Berlin, in 1858, together with a colliinatiiig 

 meridian mark and other improvements, is also provided for. The 

 old site is very unfavorable to astronomical observation, owing to its 

 l)roximity to the four tracks of tlie New York Central Kailioad, which 

 with a very heavy traffic, grou]) around the base of Observatory Ilill 

 at a distance of about 150 yards from the instiuments. The new site is 

 about 2 miles southwest of the present location upon a plot of about 6 

 acres. 



DlTNSlNK: Bamhdui. — On February 20, 1892, Sir Pobert I Jail was ap- 

 pointed to succeed Prof. Adams at (.'ambridge, and the vacancy in the 

 directorship of the Dunsink Observatory was tilled 0(;tober 22 by the 

 api)ointment of Dr. A. A. Kambaut. Dr. Itambaut's assistant is Mr. 

 A. K. Lyster. The 15-inch retlector has been used for stellar ]>hotog 

 raphy, principally for determinations of stellar parallax. 



Di'SSELDORF: Luther. — Observati(ms of asteroids and computation 

 of ephenierides. The passage of railroad trains at a distance of ."320 

 meters from the o}).servatory has not seriously interfered with the ob- 

 servations. 



Ealing : Comtnon. — An excellent 5-lbot mirror and a new grsiting 

 si)ectros(;oi)e have been made for the great telescope. Phofogiaplis 

 of nebulie and of the moon have been taken. 



Edinburgh : Copeland. — The reduction of the meridian observations 



