ASTRONOMICAL OBSERVATORIES. 419 



observatory; the failure of obtaiuiug tbe requisite fuiuls, however, 

 caused the project temporarily to be abandoned. 



]\leteorological observations alone were continued in Schonberg, near 

 Carthaus. The collecting of astronomical instruments was continued, 

 and in 1831 a small obser'satorj^ was erected upon the "Apotheke," in 

 the "Neugarten." 



In 1860 the society authorized the erection of the present observatory, 

 which was completed and inaugurated on the 2d of January, 1868, the 

 one hundred and twenty-fifth anniversary of the Naturforscheude Gesell- 

 schaft. 



Derpt (Dorpat), Russia. 

 Imperatorsl-aia AstronomicliesTiaia Observatoria. 



Longitude from Greenwich, 1'' 40'" 53.5« E. 

 Latitude, 58° 22' 47.4" N. 

 Directors : J. W. A. Tfaff, 1808. 



F. G. W. Struve, 1813. 



J. n. Madler, 1840. 



T. Clausen, 1874. 



L. ScnwARZ, 1878. 

 Founded in 1808 as a dependency of tbe university. In 1825 Fraun- 

 hofer's equatorial, with an aperture of 9 inches and a focal length of 

 13J feet, moved by clock-work, the largest and most powerful refractor 

 in the world at that time, was mounted there. With the help of this 

 instrument the elder Struve accomplished his famous Mcnsurcv Mi- 

 crometriccv, published in 1837, and continued by his successor. 



Dentz, Germany. 



. Sternwarte des Hcrrn E. Mengering {Private). 



Longitude from Greenwich, 27" 49«.9 E. 



Latitude, 50° 50' 33" N. 



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



des Observatoires et Astronomes, 1887. 

 Pro])rietor : E. Mengering. 



Dresden, Saxony. 



I. Kdnigliehcs Mathematisch-PhysiJcalisches Institut. 



Longitude from Greenwich, 54™ 50^ E. 

 Latitude, 51° 3' 45" K 



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

 des Observatoires et Astronomes, 1887. 



