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

by Agnes M. Clerke

[435] Bull. Meteor. dell Osservatorio dell Coll. Rom., Jan. 1, 1864, p. 4.

[436] Quart. Jour. of Science, vol. i., p. 222.

[437] Ann. de Chim. et de Phys., t. xxii., p. 127.

[438] Phil. Trans., vol. clix., p. 575.

[439] Les Mondes, Dec. 22, 1864, p. 707.

[440] Comptes Rendus, t. lx., p. 147.

[441] Proc. Roy. Society, vol. xvi., p. 29.

[442] Recherches sur le Spectre Solaire, p. 38.

[443] Am. Jour. of Science, 1881, vol. xxi., p. 41. Hastings stipulated only for some member of the triad, carbon, silicon, and boron.

[444] Ranyard, Knowledge, vol. xvi., p. 190.