A Popular History of Astronomy During the Nineteenth Century / Fourth Edition

by Agnes M. Clerke

[425] Vierteljahrsschrift der Naturfors. Gesellschaft (Zürich), 1859, p. 252.

[426] Lockyer, Chemistry of the Sun, p. 428.

[427] Maunder, Knowledge, vol. xv., p. 130.

[428] Month. Mon., vol. l., p. 251.

[429] Maunder, Knowledge, vol. xvii., p. 173.

[430] Astr. Nach., No. 1,315.

[431] As late as 1866 an elaborate treatise in its support was written by F. Coyteux, entitled Qu'est-ce que le Soleil? Peut-il être habité? and answering the question in the affirmative.

[432] The subsequent researches of Plücker, Frankland, Wüllner, and others, showed that gases strongly compressed give an absolutely unbroken spectrum.

[433] Comptes Rendus, t. lx., pp. 89, 138.

[434] Ibid., t. c., p. 595.