[49] Jukes, Manual of Geology, p. 127.

[50] See his Lecture On a Piece of Chalk, delivered during the Meeting of the British Association at Norwich, 1868.

[51] Lyell, Elements of Geology, p. 318.

[52] Lyell, Principles of Geology, vol. ii., chap. xlix.; Mantell, Wonders of Geology, Lecture vi.; Jukes, Manual of Geology, pp. 130-3.

[53] Sacred Philosophy of the Seasons, by the Rev. Henry Duncan, D.D.; Summer, p. 168.

[54] Ps. xcix. 3.

[55] Kotzebue’s Voyages, 1815-18, vol. iii., pp. 331-33.

[56] Wonders of Geology, p. 648.

[57] Organic Remains of a Former World, vol. ii., p. 16.

[58] Carbonic acid gas contains two equivalents of oxygen to one of carbon, the chemical expression for the compound being CO2; carburetted hydrogen, which is the gas we employ in illuminating our streets and houses, contains four equivalents of hydrogen to two of carbon, and is chemically expressed by the symbols C2H4; water is composed of one equivalent of oxygen, and one of hydrogen, the symbolic form being HO.