REPORTS OF ASTRONOMICAL OBSERVATORIES. 710 



PouLKovo, Russia. 

 Nicolacvsl-aici Glavnaia Observatoria. 



Longitude, from Greeiiwieli, !*•• 1"' LS^GT E. 



Latitnde, 59° 40' 18". 7 IS". 



Directors: F. W. G. VON Struve, 1834; 

 O. VON Struve, 1804. 



Foimded in 1834. Three principal halls on the gronnd floor, the east- 

 ern one being- used for the meridian circle, the western one for the merid- 

 ian telescope, and the southern one oc('ni)ietl by the prime vertical. 

 Three revolving domes, the central and largest containing ^Iekz and 

 Mahler's Eefractor, which has a focus of 23J feet (7'".1) and an aper- 

 ture of 15J inches (0™.40). A very ricli astronomi(;al library. The most 

 elaborate and minute researches on the minor corrections of spherical 

 astronomy, notably the corrections of aberration of nutation and pre- 

 cession, have been made chiefly at this Observatory. 



Prague, Austria. 

 K. K. Unirersitats Stermvarfe. 



Longitude from Greenwich, 57™ 41^4 E. 



Latitude, 5(P 5' 18".8 N. 



Authority for latitude and longitude: Al. David and J. BoHM. 



Directors: J. Steppling, 1751; 



A. Struadt, 1781; 



A.David, 1799; 



A. BiTTNER, 1830; 

 K. Kreil, 1845; 

 C. Jelinek, 1851; 

 J. G. BoHM, 1855; 



Dr. C. HoRNSTEiN, Professor of Astronomy, 1872 (?) 

 Assistants : Dr. A. Seidler ; 

 Dr. G. Becka ; 

 Dr. W. BosiCKY. 

 Tycho Brahe had some astronomical instruments temporarily 

 mounted at Prague (1000-1601). The Observatory, properly so called, 

 was not erected until 1751, in the Altstadt quarter, at the Collegmm 

 Clemeutinium, under the direction of the Jesuits. 



Instruments: 

 ia) Meridian circle: one; maker, Chr. Staimce (Mechamc=d work- 

 shop of the I. E. Polytechnic Institute in Vienna); diameter of mx^e, 

 30 inches; divided to 3'; read by 4 nonins to 2"; aperture of objective, 

 4 inches. 



