464 ASTRONOMICAL OBSERVATOEIES. 



The observatory furthermore owus some smaller telescopes, a 12-iuch 

 universal instrumeut by Uepsold, a pendulum clock by Kessels, and 

 one by Knoblich, box chrouometers, one each, by Kessels, Knob- 

 LiCH, and Ieede, and a considerable equipment of spectroscopic and 

 other physical, chemical, and photographic apparatus, meteorological 

 instruments, and a set of registering magnetic instruments after the 

 Kew pattern. 



Two observers were secured for its observatory on the 1st of July, 

 1874, namely: Prof. G. Sporer, formerly teacher of mathematics and 

 physics, and pro-rector of the gymnasium in Anclam, and Prof. H. C. Vo- 

 gel, formerly astronomer in the observatory of Kammerherr von Biilow, 

 in Bothkamp; Dr. Oscar Lohse, of the same observatory, was engaged 

 as first assistant. Professor Sporer continued in an iutermistic build- 

 ing in Potsdam, the solar observations made in Anclam from 18G1-1874, 

 and Professor Vogel and Dr. Lohse observed at the Berlin Observatory 

 until spring 1877, when temporary arrangements were made to enable 

 them to observe in the new institute. Dr. Gustav Mijller is em- 

 ployed as assistant since July 1, 1877, and Dr. Paul Kempf since 

 July 1, 1878. 



(Translated from, Publicationen des Astrophysikalischen Observa- 

 torium zu Potsdam. Erster Band. Mit sechszehn Tafeln. Potsdam, 

 1879.) 



Puebla, Mexico. 



Observatory of the College of Jesus. 



Longitude from Greenwich, G^' 32'" 41^ W. 



Latitude, 19^ 2' 30" N. 



Autliority for longitude and latitude: A. Lancaster, Liste Generale 



des Observatoires et Astronomes, 1887, p. 49. 

 Director : P. Spina. 



Pulkova, Bussia. 



Nicolaevslcaia Glavnaia Obscrvatoria. 



Longitude from Greenwich, 2'' 1™ 18.G7'' E. 

 Latitude, 59° 4G' 18.7" N. 

 Directors : F. W. G. von Struve, 1834. 

 Otto von Struve, 18G1. 

 Founded in 1834. Three principal halls on the ground floor, the east- 

 ern one being used for meridian circle ; the western one for the meridian 

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

 revolving domes, the central and largest coutainingMERZ and Mahler's 

 refractor, which has a focus of 23.^ feet (7.1'"), and an aperture of 15J 

 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 nutations and precession, have 

 been made chiefly at this observatory. 



