[Transcriber's note: The page numbers below are those in the original book. However, in this e-book, to avoid the splitting of paragraphs, the illustrations may have been moved to the page preceding or following.]
LIST OF ILLUSTRATIONS
| FIGURE |
|
PAGE |
| 1. |
Soil and subsoil in St George's School garden |
2 |
| 2. |
Columns showing what 100 parts of soil and subsoil were made of |
4 |
| 3. |
Columns showing what 100 parts of dried soil and subsoil were made of |
8 |
| 4. |
Clay shrinks when it dries |
11 |
| 5. |
Clay swells up when it is placed in water |
12 |
| 6. |
Landslip in the Isle of Wight.
Phot. Valentine & Son |
13 |
| 7. |
Clay does not let water run through |
14 |
| 8. |
Sand allows air to pass through but clay does not |
15 |
| 9. |
A brick allows both air and water to pass through it |
17 |
| 10. |
Lime added to turbid clay water soon makes the clay settle |
20 |
| 11. |
Sand dunes, Penhale, Cornwall.
Phot. Geological Survey |
23 |
| 12. |
Blowing sand covering up meadows and ruining them.
Phot. Geological Survey |
25 |
| 13. |
Model of a spring |
26 |
| 14. |
Foot of chalk hill at Harpenden where a spring breaks out.
Phot. Lionel Armstrong |
27 |
| 15. |
The little pool and the spring.
Phot. Lionel Armstrong |
28 |
| 16. |
Water spouting up from a bore hole, Old Cateriag Quarry, Dunbar.
Phot. Geological Survey |
29 |
| 17. |
Sandy soils in wet and in dry positions |
31 |
| 18. |
Map of the roads round Wye |
32 |
| 19. |
Peat bog in Hoy, Orkney: peat is being cut for fuel.
Phot. Valentine & Son |
39 |
| 20. |
Rye growing in surface soil, subsoil, and sand |
42 |
| 21. |
Mustard growing in surface soil, subsoil, and sand |
43 |
| 22. |
Mustard growing in soil previously cropped with rye, and in soil previously uncropped |
45 |
| 23. |
Pieces of grass, leaves, etc. change to
|
