Archive image from page 151 of Dairy farming being the. Dairy farming : being the theory, practice, and methods of dairying dairyfarmingbein00shel Year: 1880 niAPTKR YIII. The Ok Hi IX ov Soils -Cooling of the Globe—Action of Water—Formative as well as Destrnctive-Igneous, Aqueous, and Mctamorphic Rocks— Formation of S-o<a—Composition and Properties of Sand, Clay, and Liniestonc-AII Soils more or less Mixed- Humus, or Organic Matter-Essential Conditions of a Fertile Soil-Characteristics and Names of Various Soils—Processes by which Soils are Formed—Geological Formations as found
Archive image from page 151 of Dairy farming being the. Dairy farming : being the theory, practice, and methods of dairying dairyfarmingbein00shel Year: 1880 niAPTKR YIII. The Ok Hi IX ov Soils -Cooling of the Globe—Action of Water—Formative as well as Destrnctive-Igneous, Aqueous, and Mctamorphic Rocks— Formation of S-o<a—Composition and Properties of Sand, Clay, and Liniestonc-AII Soils more or less Mixed- Humus, or Organic Matter-Essential Conditions of a Fertile Soil-Characteristics and Names of Various Soils—Processes by which Soils are Formed—Geological Formations as found in the British Isles, with their Corresponding Soils and Resulting Systems of Agriculture. ,'ERY long ago—so far back, indeed, that the time which has since elapsed, even were it capable of being expressed in a definite number of years, would be quite incomprehen- sible by us—the globe on which we live, and which we call the Earth, was in a highly heated condi- tion, the intensity of the heat being so great that the materials composing the rocks which we now see around us were in a molten condition. In the course of ages much of the earth's heat was radiated into space; and this went on till at length the earth became sufficiently cooled for some portion of it to assume a solid state. It was probably in this manner that the first hard rock-masses made their appearance on the earth's surface. As the cooling continued, the water-vapour, or steam, which must have been present in the hot atmosphere, became condensed into the liquid state ; the water itself was then subjected to the cooling influence of radiation, and in course of time the earth's surface became inhabited by low forms of life. The effect of the sun's heat in those far-distant ages would be then, as now, to cause the water on the earth's surface to rise up in the form of vajmur, and so to form clouds. These clouds, floating about in the higher regions of the atmosphere, would become sufliciontly co
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