ASTRONOMY FOR 1889, 1890. 165 



Bnrchmusterung of the northern sky ; observations of sun spots. Tbe 

 new refractor for the photographic star chart is erected and some ex- 

 I^erimeutal work has been done. (1889.) 



Prag: SafariJi-. — Donble-star measures; drawings of the moon; 

 chiefly devoted to observations of variable stars. (1889.) 



Prag (University observatory): WeineJc. — Drawings of moon; occul- 

 tations. Time service. (1889.) 



PULKOWA : Bredichin. — Prof. Otto Struve retired from the direct- 

 orship of the observatory, which he has hekl for over 25 years, and lias 

 been succeeded by Dr. Bredichin, formerlj' director of the observatory 

 at Moscow. Three volumes were issued in 1889: Volume 8 containing 

 the catalogue of Bradley's stars, a volume containing an investigation 

 by Lindemann of the photometric scale of the Bonn Durchmusterung, 

 and the third volume, the " Jubilee" volume, with an historical account 

 of the observatory for 25 years, a monograph on the 30-inch refractor, and 

 a description of the astrophysical observatory. The volume contains 

 several fine engravings of the observatory and 30-inch. (1889-'90.) 



Radcliffe : kStone. — Transit- circle observations of the zone 00-15°, 

 and of the sun and moon. 



Rome: Denza. — The new observatory of the Vatican has been built 

 partly upon the site of the old observatory, founded in 1582, and partly 

 upon a tower dating from the time of Leo IV. Special attention will 

 be given to astronomical photography. 



RousDON (Lyme Regis) : Peek. — Observations of variables. Time 

 service. 



Stockholm: Gylden. — Largely engaged in mathematical researches 

 upon orbits. Photographs have been taken of the Pleiades and of a 

 region extending about 4*^ around the north pole. (1889.) 



Stonyhurst: Sidgreaves. — Father Perry, whose sad death immedi- 

 ately after observing the total eclipse of the sun on December 21, 22, 

 1889, has been elsewhere referred to, has been succeeded in the direct- 

 orship of the observatory by Father Walter Sidgreaves. (1889.) 



Strassburg: U. Becker. — Observations of comets and heliometer 

 measures of the sun's diameter; also transit-circle observations of the 

 sun and major planets. 



Sydney: Riissell. — Transit-circle observations, and with the lli-inch 

 equatorial observations of comets and of double stars. The photo- 

 graphic telescope for chart work has been mounted upon an elevated 

 site 620 feet above the sea and 11 miles inland from the present observ- 

 atory. Each instrument has its own group of accumulators, conven- 

 iently charged by the help of a gas engine. 



Smithsonian Astro physical Observatory: Langley. — An astro- 

 physical observatory has been established as a department of the 

 Smithsonian Institution at Washington, occupying at present a tem- 



