Note 21 — PREFATORY NOTE.
Reading edition
For Germs of Heliocentric Theory planted long before, etc., see Sir G. C. Lewis; also, Draper, Intellectual Development of Europe, p. 512; and for a succinct statement of the claims of Pythagoras, Philolaus, Aristarchus, and Martianus Capella, see Hœfer, Hist. de l'Astronomie, 1873, p. 107, et seq. For germs among thinkers of India, see Whewell, vol. i., p. 277. Also, Whitney, Oriental and Linguistic Studies, New York, 1874; Essay on the Lunar Zodiac, p. 345.