[669] Published in Astroph. Jour., vols. i. to vi.
[670] Astr. and Astrophysics, vol. xi., p. 793.
[671] Astroph. Jour., vol. vi., p. 95.
[672] Annales de l'Observatoire de Nice, t. iii., 1890.
[673] Trans. Royal Society of Edinburgh, vol. xxxvi., p. 99.
[674] Rev. A. L. Cortie, Astr. and Astrophysics, vol. xi., p. 401. Specimens of his photographs were given by Ranyard in Knowledge, vol. xiii., p. 212.
[675] Ann. d. Phys., Bd. cxvii., p. 296.
[676] Comptes Rendus, t. lxiii., p. 647.
[677] Ibid., t. lxxxvi., p. 317. Some half dozen of these identifications have proved fallacious.
[678] Chemistry of the Sun, p. 143.