Rendus_, t. xxxvii., p. 797.]

[Footnote 1031: _Bull. Astr._, t. v., p. 180.]

[Footnote 1032: _Annuaire_, Bruxelles, 1881, p. 243.]

[Footnote 1033: _Johns Hopkins Un. Circular_, January, 1895;
_Observatory_, vol. xviii., p. 127.]

[Footnote 1034: _Harvard Annals_, vol. xi., part ii., p. 294.]

[Footnote 1035: _Astr. Nach._, Nos. 2,724-5.]

[Footnote 1036: _Month. Not._, vol. lxi., p. 69.]

[Footnote 1037: _Astroph. Jour._, vol. vii., p. 25.]

[Footnote 1038: _Spectra der Planeten_, p. 24.]

[Footnote 1039: Tome i., p. 93.]

[Footnote 1040: _Berlinische Monatsschrift_, 1785, p. 211.]

[Footnote 1041: _Month. Not._, vol. xiii., p. 40.]

[Footnote 1042: _Mem. Am. Ac._, vol. viii., p. 221.]

[Footnote 1043: _Photom. Unters._, p. 303.]

[Footnote 1044: _Astr. Nach._, No. 1,851.]

[Footnote 1045: _Mem. de l'Ac._, t. x., p. 514.]

[Footnote 1046: _Ibid._, 1692, p. 7.]

[Footnote 1047: _Month. Not._, vol. xliv., p. 63.]

[Footnote 1048: _Photom. Unters._, pp. 165, 273; _Potsdam Publ._, No.
30.]

[Footnote 1049: Vogel, _Sp. der Planeten_, p. 33, _note_.]

[Footnote 1050: _Proc. Roy. Soc._, vol. xviii., p. 250.]

[Footnote 1051: _Month. Not._, vol. xl., p. 433.]

[Footnote 1052: _Sitzungsberichte_, Berlin, 1895, ii., p. 15.]

[Footnote 1053: The anomalous shadow-effects recorded by Webb (_Cel.
Objects_, p. 170, 4th ed.) are obviously of atmospheric and optical
origin.]

[Footnote 1054: Engelmann, _Ueber die Helligkeitsverhaeltnisse der
Jupiterstrabanten_, p. 59.]

[Footnote 1055: _Month. Not._, vol. xxviii., p. 11.]

[Footnote 1056: _Observatory_, vol. vii., p. 175.]

[Footnote 1057: _Month. Not._, vol. xlviii., p. 43.]

[Footnote 1058: _Publ. Astr. Pac. Soc._, vol. ii., p. 296.]

[Footnote 1059: Pickering failed to obtain any photometric evidence of
their variability. _Harvard Annals_, vol. xi., p. 245.]

[Footnote 1060: _Astr. and Astroph._, vol. xii., pp. 194, 481.]

[Footnote 1061: _Annals Lowell Obs._, vol. ii., pt. i.]

[Footnote 1062: _Astr. Nach._, Nos. 2,995, 3,206; _Month. Not._, vols.
li., p. 556; liv., p. 134. Barnard remains convinced that the oval forms
attributed to Jupiter's satellites are illusory effects of their
markings. _Astr. Nach._, Nos. 3,206, 3,453; _Astr. and Astroph._, vol.
xiii., p. 272.]

[Footnote 1063: _Publ. Astr. Pac. Soc._, vol. iii., p. 355.]

[Footnote 1064: _Astr. Nach._, No. 1,017.]

[Footnote 1065: _Publ. Astr. Pac. Soc._, vol. iii., p. 359.]