href="@public@vhost@g@gutenberg@html@files@16900@[email protected]#fig_17" class="pginternal" tag="{http://www.w3.org/1999/xhtml}a">Comparison of fresh and boiled water

26 18. Comparison of moist sand and puddled clay 27 19. Comparing soils 32 20. Water-test of soils 33 21. To show what becomes of the water taken from the soil by roots 40 22. Percolation experiment. To show the relative powers of soils to take in water falling on the surface 41 23. Bottles used in place of the lamp chimneys in Figs. 22 and 24 44 24. Capillarity of soils. To show the relative powers of soils to take water from below 44 25. Water-absorbing and water-holding powers of soils 45 26. Capillary tubes. To show how water rises in small tubes or is drawn into small spaces 48 27. Capillary plates 48 28. A cone of soil to show capillarity 49 29. To show the relative amounts of film-moisture held by coarse and fine soils 49 30. To show the effect of a soil mulch 56 31. Soil temperature experiment 57 32. Charts showing average temperature of a set of dry and wet soils during a period of five days 60 33. To show the value of organic matter 61 34. Soy-bean roots, showing nodules or tubercles 64 35. Garden-pea roots, showing tubercles or nodules 65 36. To show that seeds need water for germination 72 37. To show that seeds need air for germination 72 38. To show that seeds need air for germination 73 39. A seed-tester: two plates and a moist cloth 80 40. A seed-tester: a plaster cast with cavities in the surface for small seeds 80 41. Germinating corn-kernel and bean 81 42. To show how the bean-plant gets up 82 43. To show how the corn-plant gets out of the soil 82 44. To show the use of cotyledons 83 45. To show the use of the kernel to the young corn-plant 86 46.