[184] Smyth’s Celestial Cycle, pp. 210, 211.
[185] Poor, The Solar System, p. 274.
[186] Celestial Cycle, p. 246.
[187] Nature, October 2, 1879.
[188] Ibid., May 6, 1880.
[189] Ibid., February 19, 1880.
[190] Nature, September 30, 1897.
[191] Nature, August 5, 1875.
[192] Ibid., October 12, 1882, and Copernicus, vol. iii. p. 85.
[193] Nature, May 8, 1884.