1This, and all other technical terms used, will be explained in an alphabetical glossary at the end of the book.

2“Canal and River Engineering,” p. 315.

3See, Geikie’s “Text Book of Geology,” 1882, p. 72.

4Information on this subject will be found in Mr. J.H. Collins’ work, “The Hensbarrow Granite District.” Truro, 1878.

5“Text Book of Geology,” 1882, p. 85.

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

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

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

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

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

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

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

13Such 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. Loewinson Lessing; “Petrology for Students,” by A. Harker; and especially “Microscopic Physiography of the Rockmaking Minerals,” by Rosenbusch (transl. Iddings).

14Consult the works on petrology previously mentioned.

15The mode of preparation of thin rock sections for examination by the microscope is described in much detail in the works of Mr. Rutley and Professor Cole previously alluded to; also in “Outlines of Field Geology,” by Sir Archibald Geikie, 1882, p. 202 et seq.

1616th Ann. Rep. U.S. Geol. Surv. (1894–95), pt. IV., p. 532.

1716th Ann. Rep. U.S. Geol. Surv. (1894–95), pt. IV., p. 539.

18“Testing of Materials of Construction,” 1888, p. 438.

19British Clayworker, April, 1896, Supplement, p. iv.

20Op. cit. p. iv.

2116th Ann. Rep. U.S. Geol. Surv. Pt. IV., 1895, p. 532.

22Engineering News (U.S.), Dec. 13th, 1894.