f Herschel's result. Wolf, _Gesch. der Astronomie_, p.
733.]

[Footnote 20: _Phil. Trans._, vol. xcv., p. 233.]

[Footnote 21: _Ibid._, vol. xcvi., p. 205.]

[Footnote 22: "Ingens bolus devorandus est," Kepler admitted to Herwart
in May, 1603.]

[Footnote 23: Described in "Praefatio Editoris" to _De Revolutionibus_,
p. xix. (ed. 1854).]

[Footnote 24: _Opere_, t. i., p. 415.]

[Footnote 25: _Phil. Trans._, vol. xvii., p. 848.]

[Footnote 26: _Ibid._, vol. lxxii., p. 97.]

[Footnote 27: Doberck, _Observatory_, vol. ii., p. 110.]

[Footnote 28: _Phil. Trans._, vol. lvii., p. 249.]

[Footnote 29: _Ibid._, vol. lxxiv., p. 56.]

[Footnote 30: _Beobachtungen von Fixsterntrabanten_, 1778; and _De Novis
in Coelo Sidereo Phaenomenis_, 1779.]

[Footnote 31: _Bibliographie_, p. 569.]

[Footnote 32: _Phil. Trans._, vol. lxxii., p. 162.]

[Footnote 33: _Ibid._, vol. lxxiii., p. 272.]

[Footnote 34: _Ibid._, vol. xciii., p. 340.]

[Footnote 35: _Phil. Trans._, vol. lxxv., p. 255.]

[Footnote 36: _Ibid._, vol. lxxix., pp. 214, 222.]

[Footnote 37: _Ibid._, vol. xcii., pp. 479, 495.]

[Footnote 38: _Phil. Trans._, vol. ci., p. 269.]

[Footnote 39: _Ibid._, vol. cvii., p. 311.]

[Footnote 40: Bullialdus, _De Nebulosa Stella in Cingulo Andromedae_
(1667); see also G. P. Bond, _Mem. Am. Ac._, vol. iii., p. 75, Holden's
Monograph on the Orion Nebula, _Washington Observations_, vol. xxv.,
1878 (pub. 1882), and Lady Huggins's drawing, _Atlas of Spectra_, p.
119.]

[Footnote 41: _Mathemata Astronomica_, p. 75.]

[Footnote 42: _Systema Saturnium_, p. 9.]

[Footnote 43: _Phil. Trans._, vol. xxix., p. 390.]

[Footnote 44: _Mem. Ac. des Sciences_, 1755.]

[Footnote 45: _Conn. des Temps_, 1784 (pub. 1781), p. 227. A previous
list of forty-five had appeared in _Mem. Ac. des Sciences_, 1771.]

[Footnote 46: _Phil. Trans._, vol. lxxiv., p. 442.]

[Footnote 47: _Ibid._, vol. lxxix., p. 213.]

[Footnote 48: _Ibid._, vol. lxxv., p. 254.]

[Footnote 49: _Ibid._, vol. lxxix., p. 225.]

[Footnote 50: _Phil. Trans._, vol. lxxix., p. 226.]

[Footnote 51: _Ibid._, vol. lxxxi., p. 72.]

[Footnote 52: _Ibid._, p. 85.]

[Footnote 53: _Phil. Trans._, vol. ci., p. 271.]

[Footnote 54: _Ibid._, p. 277.]

[Footnote 55: J. Herschel, _Phil. Trans._, vol. cxvi., part iii., p. 1.]

[Footnote 56: His own words to the poet Campbell cited by Holden, _Life
and Works_, p. 109.]

[Footnote 57: _Phil. Trans._, vol. civ., p. 283.