EEPOKT!^ OF ASTIJOXOMICAI. OHSEKVATOIJIKS. f;79 



OBSERYATION.S I)UK1>(} TIIK PAST YEAR (flOlU JaUlUUy 1, 186U, 



to January 1, 1881) : 



(«) Fundamental stars tor Scliocn fold's "Durcliinustorniiii-." 



Additional stars of X. and S. declination for mvestij^ations eounected 

 with refrac-tion. 



Daily observations of « and ,1 Centauri for parallax. 



Small list of stars observed at request of Dr. Auwers. 



Selected list of circumpolar stars. 



Long series of observations connected Avilli investigations on personal 

 equation. 



List of stars to be used in connecting longitudes of Aden and Cai)e of 

 Good Hope. 



((') Every star, down to 6tli of May, occulted by the inooii has been 

 observed when weather permitted. Every eclipse of .Iu]>iter's satellites 

 has been observed when weather permitted. 



(/) The heliometer arrived in December. Observations with tliat in- 

 strument for annual parallax of ,5 Centauri, ; Indl and ,? Jli/dri ha\e 

 been commenced. 



Work proposed for the coming year (1881): 



Completion of observations of Schoenfeld's fundamental stnrs. 



Completion of jiersonal equation investigations. 



Continuation of observations of « and ,3 Centauri. 



Comi)letion of a useful catalogue of southern circumpolars for observ- 

 ers of transit of Venus, 1882. 



Completion of longitude connection of Aden and Cape ofCood Hope. 



Researches with the heliometer on parallax of fixed stars. 



C3ntinuance of series of observations of 0(;cultations of stars by the 

 moon and eclipses of Jupiter's satellites. Arrangements being made for 

 application of photometer to these latter observations, as at Cambridge, 

 United States. 



Additional information: 



There have been no publications of the observatory issued during the 

 past year (1880). The great catalogue of 12,400 stars, deduced from ob- 

 servations 1870-'79, was taken to England in 1879 by Mr. Stone for 

 publication, together with the annual volumes for 1877-78 in M3S. 

 Owing to necessary alterations in the microscopes of the transit circle, 

 and to some other instrumental changes, the new series of X. V. D. work 

 was not begun till March, 1880. The completion of one series of obser- 

 vations and the commencement of another creates a gap in the plan of 

 publications. The Cape catalogue for 1850, deduced from ^Nlaclear's ob- 

 servations in 1849, '50, '51, and '52 is nearly completed. It contains all 

 stars of the B. A. C. catalogue having south declination. 



There are also under preparation for press : 



Occultations of stars by the moon (about 400 in number) observed be- 

 tween 1834 and 1870, reduced and compared with tables. 



