ASTRONOMY, 173 



& Swasey, 4-inch aperture and 40 inch focus, with Ifi-inch circles: one 

 circle is coarsely divided, the other is divided to 5' and is read by two 

 microscopes to 1". The sidereal clock was made by the Self-winding 

 Clock Company, of Brooklyn, New York; it has Gerry's patent gravity 

 escapement, and is autonuitically wound by a small electric motor. Tbe 

 chronograph was designed and constructed by the director. Outside 

 the observatory proper, but ready for occasional use, are tlie O-inch, 

 5-inch, and 3-iuch retlectors, also built by Mr. Brooks, and used by him 

 at Phelps, New York, in searching for comets. 



Georfietonm {District of Columbia). — The observ^atory of Georgetowu 

 College (built in 1845) was placed under the charge of Father J. G. Ilagen, 

 S. J., in the winter of 1888. The buildings and instruments, \thich 

 have been but little used for nearly forty years, have been thoroughly 

 renovated at considerable exi)ense. Father Hagen has not as yet laid 

 out any plan for the future work of the institution. 



Glmgow [Seotland). — Observations with the transit circle of a list of 

 stars in the earlier volume of Weisse's Bessel. 



Glasf/ow ( United States). — See Morrison Observatory. 



Gohlis. — The private observatory of Herr Winkler Avas transferred 

 in 1887 from Gohlis, near Leipzig, to the neighborhood of Jena — latitude, 

 +50O 55' 35".6; longitude, Oi' 46'° 20^8 east of 'Greenwich. 



Gt>#/t«.— Considerable progress has been made in the reduction of the 

 zone observations (25° — 20°). With the meridian circle observatit)ns 

 of moon culminations and of stars of Majer's catalogue have been 

 made, and with the equatorial, observations of comets, of asteroids, 

 and of Gore's variable near x^ Orionis. 



Dr. Becker has, at the request of Professor Newcomb, collected in a 

 convenient form Hansen's formulae for the general perturbations by 

 Jupiter and has ap[)lied them to the planet Euiynome. It will be re- 

 membered that Prof. J. C. Watson made provision in his will for the 

 computation of tables of the asteroids discovered by him, which will 

 readily give the places of the planets at future oppositions. Dr. Becker's 

 work is for the purjiose of facilitating these computations. 



Dr. Paul Harzer succeeded Dr. Becker as director on December 1. 1887. 



GiUtingcn (1S8G). — Dr. Schur assumed charge of the observatory on 

 April 1, 1880, and immediately set to work to have much needed and 

 very extensive repairs made in the buildings and instruments. As most 

 of the instfuments have been dismounted, the principal work done has 

 been upon a new reduction of the zone observations made by Jvlinker- 

 fues from 1858 to 1803. A G-iuch Kepsold heliometer has been ordered. 

 The [)ersonnel of the observatory consists (with the director) of observ- 

 ator, Dr. Battermaun; assistant, Herr Clemens, and computer, Heidorn. 



Greenwich. — The regular meridian observations of the sun, moon, and 

 major and minor planets have been kept up as before, and satisfactory 

 progress has been made with tbe reductions for a new ten-year cata- 

 logue (1877-'80). Observations of the moon have been made with the 



