[374] Ibid., p. 499.

[375] Copernicus, vol. iii. p. 55.

[376] Lick Observatory Bulletin, No. 149.

[377] Ibid.

[378] Ibid.

[379] Monthly Notices, R.A.S., April, 1908, pp. 465-481.

[380] Lick Observatory Bulletin, No. 155 (February, 1909).

[381] Outlines of Astronomy, par. 870 (Edition of 1875).

[382] Georgics, i. II. 217-18.

[383] See paper by Mr. and Mrs. Maunder in Monthly Notices, R.A.S., March, 1904, p. 506.