THE recent advances in our knowledge which have come from the combination and interaction of solar, stellar and laboratory research, carried on by the aid of instruments of much greater power than those formerly used, have given us a firm chemical hold on all the groups of stars in my classification of them. These groups were established by discussing sequences of lines before the origin of the lines had been made out. A series of hieroglyphics is now replaced by chemical facts; and we can now study the chemistry of the stars, as well as their order in a system of classification.
Proc. Roy. Soc., vol. lxi. p. 148.
NATURE, February 9 (p. 342).
See Astrophysical Journal, iv. p. 369, and v. p. 95.
Proc. Roy. Soc., vol. lxii. p. 52.
Proc. Roy. Soc., vol. xxx. p. 461.
Proc. Roy. Soc., vol. xliii. p. 117 (1887).
Proc. Roy. Soc., vol. xliv. p. 1 (1888); ibid., vol. xlv. p. 380 (1889); Phil. Trans., 184A, 1893, p. 725.
Proc. Roy. Soc., vol. lxi. p. 182.
Proc. Roy. Soc., vol. lxi. p. 183.