700 KEPOKTS OF ASTRONOMICAL OBSERVATORIES. 



Peter I. Horrebow, 1714} 



C. Horrebow, 1753 ; 



T. BuGGE, 1777; 



H. C. Schumacher, 1815; 



VoN Caroc, 1822 ; 



C. F. E. Olufsen, 1832 ; 



H. d' Arrest, 185G; 



T.«^K Thiele, 187C. 

 Assistants: Schjellerup; 



Pechule. 

 Foimdetl in 1637, but only coaipleted in 1G5G. The first edifice was 

 destroyed by fire the 20tli of October, 1728. The Observatory was re- 

 established in the round tower belonging to the University. In 1820 

 a wooden addition was made to it on the Holken bastion. Finally, in 

 1857, it was reorganized and removed to the glacis of the fortress be 

 tweeu'the citadel and the Osferthor (eastern gate). 



KoNiGSBERG, Prussia. 

 TJniversitlits Sternicarte. 



Longitude from Greenwich, 1'' 21'" oS^.Ol E. 



Latitude, 54° 42' 50".6 ^\ 



Directors: Z. W. Bessel, 1811; 

 A. L. BusCH, 1849; 

 M. L. G. WiCHMANN, 186G ; 

 Prof. E. Luther, 18G0. 



Constructed in 1811 on one of the most elevated points of the ram- 

 parts to the northwest of the town. A main building divided into two 

 great halls — a northern and a southern. Two wings — one the meridian 

 hall, the other an addition. With the use of a meridian circle, made by 

 Eeichenbach and Ertel, 0™ 97 in diameter, Bessel and his assistants 

 accomplished the work known as the "Konigsberg Zones," giving the 

 exact positions of G2,000 stars between the parallels of — 15° and + 45°. 



This great undertaking was begun 19th August, 1821, and finished 

 January 21, 1833. 



Krakau, Austria. (Cracow.) 

 K. K. Sternwarte. 



Longitude from Greenwich, P 19™ 50^5 E. 



Latitude, 50° 3' 50" N. 



Directors: J. J. VON Littrow, 1807; 



J. Leski, 1811 ; 



M. Weisse, 1825; 



Prof. Dr. Francis M. Karlinsky, 1864. 



