قراءة كتاب Lessons on Soil

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‏اللغة: English
Lessons on Soil

Lessons on Soil

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دار النشر: Project Gutenberg
الصفحة رقم: 2




[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

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