[52] See Phil. Mag. for October, 1870, p. 259.
[53] Proceedings of the Royal Society, No. 138, p. 596, foot-note.
[54] The edition from which I quote, unless the contrary is stated, is the one published by Messrs. T. Nelson and Sons, 1870, which is a reprint of the new edition published in 1859 by Messrs. Sampson Low and Co.
[55] “Physical Geography,” article 57.
[56] Philosophical Magazine, vol. xii. p. 1 (1838).
[57] “Mémoires par divers Savans,” tom. i., p. 318, St. Petersburgh, 1831. See also twelfth number of Meteorological Papers, published by the Board of Trade, 1865, p. 16.
[58] Dubuat’s “Hydraulique,” tom. i., p. 64 (1816). See also British Association Report for 1834, pp. 422, 451.
[59] See Proceedings of the Royal Society for December, 1868, November, 1869. Lecture delivered at the Royal Institute, Nature, vol. i., p. 490. Proceedings of the Royal Geographical Society, vol. xv.
[60] Trans. of Glasgow Geol. Soc. for April, 1867. Phil. Mag. for February, 1867, and June, 1867 (Supplement).
[61] Phil. Mag. for February, 1870.