[54] Ibid., p. 154.
[55] Nature, July 13, 1876.
[56] P. M. Ryves in Knowledge, June 1, 1897, p. 144.
[57] Bulletin, Ast. Soc. de France, August, 1905.
[58] Nature, April 5, 1894.
[59] Nature, May 14, 1896. Some have attributed these “luminous clouds” to light reflected from the dust of the Krakatoa eruption (1883).
[60] The Observatory, 1877, p. 90.
[61] Popular Astronomy, vol. 11 (1903), p. 293.
[62] Popular Astronomy, vol. 13 (1905), p. 226.
[63] Nature, July 25, 1901 (from Flammarion).