Lessons on Soil

81 chapters

1. 1LESSONS ON SOIL
2. 2E. J. RUSSELL, D.Sc. (Lond.)
3. 3GOLDSMITH COMPANY'S SOIL CHEMIST, ROTHAMSTED EXPERIMENTAL STATION
4. 4Cambridge: at the University Press 1911
5. 5PREFACE
6. 6CONTENTS
7. 7LIST OF ILLUSTRATIONS
8. 8INTRODUCTION
9. 9CHAPTER I WHAT IS THE SOIL MADE OF?
10. 10Fig. 1. Soil and subsoil in St George's school garden
11. 11Fig. 2. Columns showing what 100 parts of soil and subsoil were made of
12. 12Fig. 3. Columns showing what 100 parts of dried soil and subsoil were made of
13. 13CHAPTER II MORE ABOUT THE CLAY
14. 14Fig. 4. Clay was plastered over a square piece of board and completely covered it. After drying for a week the clay had shrunk and cracked
15. 15Fig. 5. Clay swelling up when placed in water and overflowing from the egg-cup into which it was put
16. 16Fig. 6. Landslip in the Isle of Wight
17. 17Fig. 7. A thin layer of clay a entirely prevents the water running through
18. 18Fig. 8. Sand allows air to pass through it, and so water runs out of the bottle. Clay does not let air pass, and the water is therefore kept in, even though the tube is open.

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