CALIFORNIA ACADEMY OF SCIENCES. 



351 



Satellites of Jupiter. 



during the year 1884. 



A = 3A 01m 30.50s, "W. of Wash. 



Chron. 



Time as 



Noted. 



True Local 



Mean 

 Solar Time. 



Prediction 



by 

 Amer. Eph 



a a < 



So o 



Remarks, Etc. 



A. m. s. 

 12 13± 

 12 21. 8± 



5 58 22 



6 05 25 



6 22 18.5 

 6 25.8 



6 06 15± 



7 17 24.5 



7 20 06.2 



8 14 02.5 



7 05 35 



7 09 54 



9 15 40 

 9 19 00 

 9 55 25 



10 00 31 

 6 13 20 



6 16 10 



7 22 00 



7 26 20 



8 26 45 



8 30 52.5 



8 36 45 



8 40 30 

 . 9 42 05 



9 46 30 



8 08 09.0 

 8 10 24 

 8 19 20 

 8 24 48.0 



11 51 51.0 

 11 56 40 



8 20± 



11 03 12 



11 36.5 



12 40.9 



A. m. s. 

 12 13 07 

 12 21 55 



7 25 24.3 

 7 32 26.2 

 7 45 22.1 

 7 49 12 



6 07 39.2 



7 18 48.8 



7 21 30.5 



8 15 26.9 



7 45 29.6 



7 49 47.9 



9 55 13.4 

 9 58 32.8 



10 34 52.0 



10 39 57.1 

 6 37 47.2 



6 40 36.7 



7 46 16.0 



7 50 35.2 



8 50 50.5 

 8 54 57.3 



8 33 27.3 



8 37 11.7 



9 38 36.8 

 9 43 01.0 

 8 00 02.8 

 8 02 18.0 

 8 11 12.0 

 8 16 39.0 



11 43 08.5 

 11 48 00.0 



7 48 31 



10 31 12 



11 29 12 

 11 33 36 



—17.2 



—13.2 



+ 158.4 

 4 02.7 



Seeing only moderately good. A "Black 

 Transit'' of IV c. f. "Sidereal Mes- 

 senger," May, 1884. 



Seeing very bad; second observation 

 better than first. 



Possibly a little late. 



Guess only. 



Too much daylight and clouds passing; 

 obsv. probably useless. 



Good; decidedly on 26 sees, later; assist- 

 ant marking time. 



Good; assistant marking time. 



Good; decidedly off 25 sees, later; assist- 

 ant marking time. 



Atmos. uns.; impossible to tell within 

 10 sees. 



Same remark. 



Atmos. unst.; notch certain 30 sees, later. 



Edge of Jupiter vy. unst., and not nearly 



so brt. as Sat. 

 Well separated 30 sees, later. 

 Moderately unsteady. 

 Time recorded " bet. 50s and 55s " = 52.5s 



mean. 

 Atmos. in very bad condition. 

 Objects to-night all very unsteady. 



Atmos. mod. St.; definition good. 



Sparkle lingered very long time, time of 



final dis. ± 02s. 

 Fairly well caught. 



Time estimated from glimpses; clouds 

 passing. 



Atmos. moderately unst. Sky clear. 



Seeing much worse, occasionally good 

 definition; time checked by estimates, 



Observers— G. D. = Prof. Geo. Davidson. 

 C. B. H. = Chas. B. Hill. 



