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Dalton’s ‘Meteor. Observ.’ 1793, pp. 54, 153.
Loomis, ‘Sill. Journal,’ 2nd series, xxxii. p. 324; xxxiv. p. 34. The same, 3rd series, v. p. 245; B. V. Marsh, 3rd series, xxxi. p. 311.
Oettingen and Vogel, Pogg. Ann. cxlvi. pp. 284, 569.
Galle and Sirks, ibid. cxlvi. p. 133; cxlix. p. 112.
Silbermann, ‘Comptes Rendus,’ lxviii. pp. 1049, 1120, 1140, 1164.
Prof. Fritz, “Geog. Distrib.,” Petermann’s Mitth., Oct. 1874.
Zehfuss, ‘Physikalische Theorie.’ Adelman, Frankfort.
‘Nature,’ iii. pp. 6, 7, 28, 104, 126, 346, 348, 510; iv. pp. 209, 213, 345, 497, 505; x. 211 (Ångström).
‘Edinburgh Astronomical Observations,’ vol. xiv. 1870-1877.