[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 h.e.l.ligkeitsverhaltnisse 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.]

[Footnote 1066: _Astr. Nach._, No. 3,432.]

[Footnote 1067: _Astr. Jour._, Nos. 275, 325, 367, 472; _Observatory_, vol. xv., p. 425.]

[Footnote 1068: Tisserand, _Comptes Rendus_, October 8, 1894; Cohn, _Astr. Nach._, No. 3,404.]

[Footnote 1069: _Bull. Ac. R. Bruxelles_, t. xlviii., p. 607.]

[Footnote 1070: _Astr. Nach._, No. 2,294.]

[Footnote 1071: _Ibid._, No. 2,284.]

[Footnote 1072: Denning, _Month. Not._, vol. xliv., pp. 64, 66; _Nature_, vol. xxv., p. 226.]

[Footnote 1073: _Sidereal Mess._, December, 1886, p. 289.]

[Footnote 1074: _Astr. Nach._, Nos. 2,280, 2,282.]

[Footnote 1075: _Month. Not._, vol. xlvi., p. 117.]

[Footnote 1076: _Proc. Roy. Soc. N. S. Wales_, vol. xiv., p. 68.]

[Footnote 1077: _Phil. Trans._, vol. i., p. 143.]

[Footnote 1078: For indications relative to the early history of the red spot, see Holden, _Publ. Astr. Pac. Soc._, vol. ii., p. 77; n.o.ble, _Month. Not._, vol. xlvii., p. 515; A. S. Williams, _Observatory_, vol.

xiii., p. 338.]

[Footnote 1079: _Astr. and Astrophysics_, vol. xi., p. 192.]

[Footnote 1080: _Month. Not._, vol. l., p. 520.]

[Footnote 1081: _Observatory_, vol. xiii., pp. 297, 326.]

[Footnote 1082: _Trans. R. Dublin Soc._, vol. iv., p. 271, 1889.]

[Footnote 1083: _Publ. Astr. Pac. Soc._, vol. ii., p. 289.]

[Footnote 1084: _Astr. and Astrophysics_, vol. xi., p. 686.]

[Footnote 1085: Denning, _Knowledge_, vol. xxiii., p. 200; _Observatory_, vol. xxiv., p. 312; _Pop. Astr._, vol. ix., p. 448; _Nature_, vol. lv., p. 89.]

[Footnote 1086: Williams, _Observatory_, vol. xxiii., p. 282.]

[Footnote 1087: _Month. Not._, vol. lvi., p. 143.]

[Footnote 1088: Belopolsky, _Astr. Nach._, No. 3,326.]

[Footnote 1089: _Publ. Astr. Pac. Soc._, vol. iv., p. 176.]

[Footnote 1090: _Bull. Astr._, 1900, p. 70.]

[Footnote 1091: _Month. Not._, vol. x.x.xi., p. 34.]

[Footnote 1092: _Beobachtungen_, Heft ii., p. 99.]

[Footnote 1093: _Ber. Sachs. Ges. der Wiss._, 1871, p. 553.]

[Footnote 1094: _Month. Not._, vol. lix., p. 76.]

[Footnote 1095: _Beziehungen der Sonnenfleckenperiode_, p. 175.]

[Footnote 1096: A. Hall, _Astr. Nach._, No. 2,269.]