[11] Danville Quarterly Review, December, 1861.
[12] Others, it was supposed, might have originated within the system,—a view which the writer has not wholly abandoned.
[13] "Quæst. Nat.," lib. vii., cap. xvi.
[14] Chambers' "Descr. Astr.," p. 374.
[15] Ibid., p. 383.
[16] Ibid., p. 388.
[17] Hevelius, "Cometographia," p. 341. See also Grant's "Hist. of Phys. Astr.," p. 302.
[18] "Cometographia," p. 417.
[19] Williams' "Chinese Observations of Comets," p. 73.
[20] One of the parts was seen at Madras, India, on the mornings of December 2 and 3, 1872.