REPORTS OF ASTRONOMICAL OBSERVATORIES. 710 



PouLKOVo, R2issia. 

 Nicolaevslcaia Glavnaia Ohservatoria. 



Longitude from Greenwich, 2'' 1'" IS^'OT E. 



Latitude, 59° 46' 18".7 X. 



Directors: F. W. G. von Struvk, 1834; 

 O. VON Struve, 18G4. 



Founded in 1834. Tiiree])rin('ipal halls on the ground floor, the east- 

 ern one being used for the meridian (;ir<*le, the western one for the merid- 

 ian telescope, and the southern one occupied by the prime vertical. 

 Three revolving domes, the central and largest containing Mkrz and 

 Mahler's Refractor, which has a focus of 23^ feet (7™.l) and an aper- 

 ture of 15^ inches (0'".40). A very rich astronomical 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. Unirersitdts Sternwarte. 



Longitude from Greenwich, 57"^ 41^4 E. 

 Latitude, 50° 5' 18".8 N. 



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

 Directors: J. Steppling, 1751 5 

 ) A. Struadt, 1781; 



A. David, 1799; 

 A. BiTTNER, 1836; 

 K. Kreil, 1845; 

 C. Jelinek, 1851; 

 J. G. Bohm, 1855; 



Dr. C. HoRNSTEiN, Pro/e6-sor of Astronomy ^ 1872 (?) 

 Assistants: Dr. A. Seidler ; 

 Dr. G. Beck A ; 

 Dr. W. EosiCKY. 

 Tyciio Brahe had some astronomical instruments temporarily 

 mounted at Prague (1600-1001). The Observatory, properly so called, 

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

 Clementinium, under the direction of the Jesuits. 

 Instruments : 

 {a) Meridian circle: one: maker, CiiR. Starke (Mechanical work- 

 shop of the I. K. Polytechnic Institute in Viemna); diameter of circle, 

 36 inches; divided to 3'; read by 4 nonius to 2"; aperture of objective, 

 4 inches. 



