REPORTS OF ASTRONOMICAL OBSERVATORIES. 717 



Paramatta, Neic South Wales. 



Paramatta Obm-vatorij. (See Sydney.) 



Longitude from Greenwieli, 10'' i"' G«.2 E. 

 Latitude, 3oO 48' 49".8 N. 

 Director: ? 



Paris, France. 



Ohservatoire Kationale. 



Longitude from Greenwich, 9™ 2ls.02 E. 

 Latitude, 48° 50' 11".8 i^. 

 Directors : J. D. Cassini, 1<»71; 

 J. Cassini, 1712; 



C. F. Cassini (de Thury), 175f)j 

 J. D. Cassini (de Thury), 1784; 

 J. J. L. DE La Lande, 1795; 



P. Mechrin, 1801 ; 

 A. Brunard, 1804; 



D. F. J. Arago, 1811; 



U. J. J. Le Verrier, 1853; 

 C. E. Delaunay, 1871; 

 U. J. J. Le Verrier, 1872; 



E. MoucHEZ, 1878. 



National Observatory (formei'ly Eoyal, since Imperial) built in 1GG7 

 under the auspices of the Academy of Sciences, according to plans of 

 C. Perrault. a vast central haU; two towers, east and west. In 

 1732, a small room to accommodate a mural quadrant was added beyond 

 the eastern tower, and in 1742 this was extended by a second enclosure 

 for a moveable quadrant. In 1700 a turret with a revohing roof was 

 built to the south of this addition. The main building having become 

 dilapidated was restored in 1780— completed 1793— since when it has 

 been detached and the south terrace built. In 1832 the snuill room^ 

 where observations are taken Avere repaired, and the ami)hitheater 

 and a rotunda with a revolving roof built upon the principal terrace. 

 The dome intended for the shelter of the great equatorial was placed 

 on the summit of the building in 1850. The great telescope with a mir- 

 ror of silvered glass— 4 feet (1™.2) in diameter— was mounted in 187G, iu 

 a building on the grouud-Hoor level. Joun Dominic Cassini discov- 

 ered four of the sateUites of Saturu at the Paris Observatory, and also 

 first investigated the subject of tlie Zodiacal Light, and here, too, the 

 great grandson of this astronomer was the first to follow the variations 



