152 EECORD OF SCIENCE FOR 1886. 



for work in May, 1886. The S-iiicli glass lias been used for double stars, 

 comets, etc. Messrs. Eajna, Porro, and Abetti have been engaged in 

 geodetic work. 



Morrison Observatory (1880). — The work of the equatorial for 1886 

 has consisted of a series of observations on comets Fabry, Barnard, 

 and Finlay (reduced and published or ready for publication) ; physical 

 observations of Jupiter and phenomena of Jupiter's satellites, with a 

 few observations of occultatious by the moon. The meridian circle can 

 be used, at present, only for time observations and for the determina- 

 tion of such star-places as are needed in equatorial work. A daily and 

 efficient time-service is maintained on railroads extending to St. Louis, 

 Chicago, and Kansas City, and thence south and southwest. Meteor- 

 ological observations are kept up with regularity. 



Professor Pritchett has prepared a small volume of the unpublished 

 observations of former years. Tbis is now passing- through the press, 

 and will be distributed as soon as practicable. The expense of publi- 

 cation is borne by Mrs. Berenice Morrison-Fuller, the founder of the ob- 

 servatory. 



The annual income of the observatory is $2,160. This covers all ex- 

 penses, including salaries. The director has no assistance, except that 

 rendered by his daughters, and such as is afforded by a boy in handling 

 the instruments and caring for the rooms. 



Mu7iich (1885), — The revision of Lamont's catalogue is progressing 

 favorably. A number of stars from the southern Durchmusterung have 

 been added to the observing list, to till up gaps. Dr. Seeliger has fin- 

 ished a count of the stars in this southern extension of the Durchmus- 

 terung similar to the one already published for stars of the northern 

 hemisphere. Dr. Bauschinger was obliged to devote two months of 

 the year to " Militiirische Verpfiichtungen." 



Nice (1880). — The refractor of 30 inches was provisionally mounted in 

 August, and it is stated that the trials wiih it have given most excel- 

 lent results. 



O^Gyalla (1885). — The main work of the observatory has been the ex- 

 perimental determination of the mechanical energy of the radiations 

 of thirty-four stars of the first and second jnagnitude. The spectro- 

 scopic " Durchmusterung " of a zone 0"^ to 15° is nearly completed. 

 Sun-spots are observed regularly. 



Oxford University Observatory (1886). — Professor Pritchard's report 

 was read to the board of visitors on June 16. The photometric meas- 

 urement of the magnitudes of an equatorial zone of stars has been un- 

 dertaken. Attention will be given to astronomical photography — a 

 department of work for which the observatory is well equijiped — di- 

 recting investigations to, first, the relation which exists between the 

 jihotometric and the photographic magnitude of stars; second, the re- 

 liable uniformity of the photographic film; third, the amount of astro- 

 nomical accuracy attainable on the same. 



