Note 653 — Chapter IV
Reading edition
Proc. Roy. Soc., vol. xxiv., p. 353. These are the H and K of prominences. H. W. Vogel discovered in 1879 a hydrogen-line nearly coincident with H (Monatsb. Preuss. Ak., February, 1879, p. 118).
Reading edition
Proc. Roy. Soc., vol. xxiv., p. 353. These are the H and K of prominences. H. W. Vogel discovered in 1879 a hydrogen-line nearly coincident with H (Monatsb. Preuss. Ak., February, 1879, p. 118).