[5] “Text Book of Geology,” 1882, p. 85.

[6] “Aids in Practical Geology,” 1893, page 36.

[7] See E. S. Dana, “Minerals and How to Study Them,” 1895, p. 154.

[8] Consult “Applications of Geology,” etc., by Prof. Ansted, 1865, p. 116, et seq.

[9] “Industrial Resources of the Tyne, Wear and Tees,” 1864, p. 204.

[10] R. H. Scott, “Elementary Meteorology,” 1883, p. 137.

[11] Report of British Association for 1846, Part II., p. 17.

[12] Geological Magazine, N.S., Dec. III., Vol. V, 1888, pp. 26 et seq.

[13] Such as “The Study of Rocks,” by F. Rutley: “Aids in Practical Geology,” by Prof. Grenville Cole; “Tables for the Determination of the Rock-forming Minerals,” by Prof. Lœwinson Lessing; “Petrology for Students,” by A. Harker; and especially “Microscopic Physiography of the Rockmaking Minerals,” by Rosenbusch (transl. Iddings).

[14] Consult the works on petrology previously mentioned.