[274] Popular Astronomy, vol. 15 (1907), p. 194.
[275] Popular Astronomy, vol. 15 (1907), p. 195.
[276] Bulletin, Ast. Soc. de France, February, 1903.
[277] Here χ is probably 17 Cygni, χ being the famous variable near it.
[278] Popular Astronomy, vol. 13 (1904), p. 509.
[279] Astrophysical Journal, December, 1895.
[280] The Observatory, July, 1895, p. 290.
[281] Celestial Cycle, p. 302.
[282] Nature, December 13, 1894.
[283] Histoire Celeste, p. 211.