446 ASTRONOMICAL OBSERVATORIES. 



either iostrumeut tUe circles read sufficiently for the finding of objects. 

 The driving-clock has, in addition to the usual governor balls, a second- 

 ary control of a pendulum in electrical connection with a standard 

 cluck. 



Up to 1870, when the present equatorial was erected, a transit circle 

 of 3.^ inches aperture was mounted in the observatory. At that time 

 the principal instrument the observatory contained was an 8-inch re- 

 fractor by Alvan Clark, mounted equatorially by Cooke, of York. 



There is a fine sidereal clock by Arnold, and various spectroscopes 

 for use, with the telescopes, on the sun and stars; and there has been 

 recently added a spectroscope, with Iceland spar prism and quartz 

 lenses, for photography of spectra of stars. 



Underneath the observatory are two rooms, one devoted to chemistry 

 and photography, the other to physical experiments in connection with 

 spectruui analysis. 



LouvAiN, Belgium. 



I. Ohserraioirc dcs College de la Compagnie de Jesus. 



Longitude from Greenwich, 18™ 48^ E. 



Latitude, 50° 53' 21" N. 



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



des Observatoires et Astronomes, 1887. 

 Director : J. TniRiON, S. J. 



II. Private Observatory of Dr. Terhy. 



Longitude from Gieenwich, 18" SP E. 



Latitude, 50° 52' 40" N. 



Authority for longitude and latitude: A. LANCASTER, Liste G6u6rale 



des Observatoires et Astronomes, 1887. 

 Director: Dr. Terby. 



LtJBECK, Germany. 



Stcrnirarte. 

 Longitude from Grcenwicli, 42'" 45.7* E. 

 Latitude, 53° 51' 31.2" X. 

 Director: Ed. Thiel. 



Founded in 1800 as an annex to the navigation school. The tower, 

 with a revolving turret of 20 feet diameter, stands upon the ramparts 

 to the south of the town 03 feet above the level of the Baltic. 



LucKNow, India. 

 Observatory. 

 Longitude from Greenwich, 5'' 23™ 24.02« E. 

 •Latitude, 20° 51' 10" X. 



Authority for longitude and latitude: Annuaire des Bureau des Longi- 

 tudes, 1884, p. 412. 



