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

by Agnes M. Clerke

[358] Mittheilungen der Naturforschenden Gesellschaft, 1852, p. 183.

[359] Archives des Sciences, t. xxi., p. 194.

[360] Neue Untersuchungen, Mitth. Naturf. Ges., 1852, p. 249.

[361] Phil. Trans., vol. xci., p. 316.

[362] Evidence of an eleven-yearly fluctuation in the price of food-grains in India was collected some years ago by Mr. Frederick Chambers. Nature, vol. xxxiv., p. 100.

[363] Bibl. Un. de Genève, t. li., p. 336.

[364] Neue Untersuchungen, p. 269.

[365] Die Sonne und ihre Flecken, p. 30. Arago was the first who attempted to decide the question by keeping, through a series of years, a parallel register of sun-spots and weather; but the data regarding the solar condition amassed at the Paris Observatory from 1822 to 1830 were not sufficiently precise to support any inference.

[366] Phil. Trans., vol. xxix., p. 421.

[367] Ibid., vols. cxliii., p. 558, cxlvi., p. 505.