REPORTS OF ASTRONOMICAL OBSERVATORIES. 735 



refractors of 4-incli aperture; one of tliem not O(iiiatori:illy inotintcl. 

 One equatorial of 3-iueb aperture, adapted for various latitudes, object- 

 ives by FRAUENnoPER. One equatorial of ;Miic1i ai)erturc, by DoL- 

 LOND. One dialitic equatorial of Plossel, of 5 iuclu's. One Conict- 

 seeker, of 6-iuch aperture, and 4 feet focal leuoth, by Mkijz; mounted 

 equatorially on the principle of Yillareau, by Schneider. One 

 comet-seeker of 3-incli aperture by Plossel; one of 2i inches, by Stein- 

 heil. Besides tlieSe, various smaller portable transit instruments, the- 

 odolites, sextants, &c. 



Observations during the past \tear (1880— June, 1881): 



(a) Adapting- instrument to the new Observatory ; not regularly in 

 use. Mostly used for determination of clock error, &c. 



{b') The same remarks applicable. 



(c) {&) Observations made of asteroids and comets. 



Work proposed for the coming year (1881-1882): 



Continuation of observations of asteroids and comets, with the two 

 equatorials: Zone observations (re-observations of stars observed by 

 Santini, between deck 0° and. 10°) with the meridian circle. If the 

 large equatorial of 27 inches by H. Grurr, at Dublin, can be mounted 

 in due time, observations with it will be commenced at oucej but the 

 plan of operation is not yet settled. 



Principal publications during the year (1880): 



E. Weiss; "Annalen der K. K. Sternwartc in Wieu," iii Folge, Pd. 

 29, Vienna, 1881; 1 vol., 226 pp. 



E. Weiss; "Ueber die Bahn der Kometen 1843 (I), and 1880 (?;)." 

 AUd. d. Wiss. in Wien, 1880; 1 vol., 20 pp. 



E. Weiss, "Ueber Berechnung der Differentialquotienten in stark 

 excentrischen Bahnen." Akad. d. Wiss. in Wicn, 1881; 1 vol., 11 pp. 



J. HoLETSCHEK; "Bahnbestimmung dcs Plaueteu Pcitho." Alad. 

 d. Wiss. in Wien, 1881; 1 vol., 15 pp. 

 Additional information: 



The principal instrument of the Observatory will be an ecpiatorial of 

 27-incli object-glass, and about 32 feet focal length, manufactured by 

 Howard Grubb at Dublin; but it is not yet out of the contractor's 

 hands. The first Assistant, Mr. J. Palisa, re-disco vered Juewa (139), 

 February 23, 1881; and discovered asteroid (220) May 18, 1881. 



Wien, {Josephstadt,) Austria. 

 Observatory of the High School of Technology. 



Longitude from Greenwich, 1^ 5°" 25«.3 E. 

 Latitude, 48° 12' 53".8 K 

 Directors: J. Herr, 18G5; 



W. Sinter, 1870. 

 Founded in 1865 at the southwestern extremity of the city; com- 

 pleted in 1867. 



