XXll 



GENERAL SUMMARY OF SCIENTIFIC AND 



Following is a list of the minor planets discovered during tlie 

 year : 



MINCE, PLAJSIETS. 



Palisa, of Pola, has likewise rediscovered Maia (66), which has 

 been lost for some time. 



Le Verrier has published, or shortly will publish, tables of Jupiter, 

 Saturn, Uranus, and Neptune. Other occui3ations have hindered 

 Mr, George W. Hill in the preparation of his tables of Saturn, 



The theory of the satellites of Jupiter has been investigated by 

 Souillart, who is preparing tables of their motion, Todd, of Wash- 

 ington, has extended the tables of Jupiter's satellites to 1900, and 

 the American ephemeris will publish the tables. Newcomb has 

 published tables of the motion of the satellites of Uranus and Nep- 

 tune. A great number of observations of the satellites of Saturn 

 has been made by Hall at W'ashington, and at Greenwich, and Glas- 

 gow, Missouri, observations have been made, aided by the valuable 

 ejjhemeris of Marth. The Washington observers have also made a 

 number of observations of the satellites of Uranus and Neptune, 

 Hall has discovered a white spot on Saturn which has been fol- 

 lowed through over sixty revolutions, and the observations of which 

 give a rotation time of 10^ l^'" 23.8^2.3^ The Observatory of Ley- 

 den has become possessed of Schroeter's unpublished work on Mars. 



COMETS. 



There has been no discovery of a comet during the year. 



Bredichin, of Moscow, has published an important memoir on the 

 phenomena of the tail of Comet III., 1862. Kowalczyk, of Warsaw, 

 has published a definitive orbit of Comet II., 1840. It is an ellipse 

 of about 3700 years' period. Weiss, of Vienna, in investigating the 

 orbit of the comet of Coggia (November, 1873), concludes it to have 

 a period of 6.20 years, and to be identical with that of Pons (1818). 

 Tuttle's periodic comet will reappear in 1884, and the preparation 



