482 ASTRONOMICAL OBSERVATOiaES. 



WoLSiNGiiAM, England. 

 Ohservaiorii of the Liverpool Astronomical Society. 



Longitude froii: Green wicli, . 



Latitude, . 



Authority: A. Lancaster, Liste Generale, etc., 18S7, p. 03. 

 Observer: T. E. Espin. 



Zacatecas, Mexico. 



Ohservafory. 



Longitude from Greenwich, C' 41'" 0.67'^ W. 



Latitude, 22° 4G' 34.9" N. 



Authority lor longitude and latitude: A. LANCASTER, Liste Geuerale 



des Observatoires et Astronomes, 1887. 

 Director: A. Jose y Bonilla. 



ZiKAwEi, China. 



Longitude from Greenwich, . 



Latitude, . 



Director : Marc Dechevreus. 



Zurich, Switzerland. 



I. Sternwarfe des ISchwei-zerischcn Polytechnikums. 



Longitude from Green^Yich, 34"' 12.G» E. 



Latitude, 47° 22' 40" N. 



Authority for longitude and latitutle: Astrouomische Mittheilungen 



von Dr. Eudolf Wolf. 

 Directors : J. H. Waser, 1773. 

 J. Feer, 1787. 



J. ESCHMANN, 1823. 



llUDOLF Wolf, 18G0. 



Founded in 1773 upon the Carolus Thurm (Charles Tower), through 

 the efforts of the Ziirich Society of Naturalists. Abandoned from 17D8 

 to 1805. In 1810 ii new observatory was erected east of the Carolus 

 Thurm ; this was abandoned in 1852. Finally in 1800 the observatory 

 was rebuilt at the polytechniknm, where it was inaugurated in 1803. 



The observatory is mainly used for the practical training of the stu- 

 dents. The scientific results are voluntary contributions by the director 

 and assistant. 



Instruments : 



{a) Meridian circles : Two; makers, Kern, in Aarau, Ertel, in Mu- 

 nich; diameter of circles, 20 inches; divided to 2'; read by 2 micro- 

 scopes to 0.1" ; aperture of objective, 5.3 inches ; magnifying power 

 ordinarily employed, 120.80. - 



