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The Earth as Modified by Human Action eBook

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George P. Marsh

CHAPTER III.

The woods.

The Habitable Earth Originally Wooded—­General Meteorological Influence of the Forest—­Electrical Action of Trees—­Chemical Influence of Woods—­Trees as Protection against Malaria—­Trees as Shelter to Ground to the Leeward—­Influence of the Forest as Inorganic on Temperature—­Thermometrical Action of Trees as Organic—­Total Influence of the Forest on Temperature—­Influence of Forests as Inorganic on Humidity of Air and Earth—­Influence as Organic—­Balance of Conflicting Influences—­Influence of Woods on Precipitation—­Total Climatic Action of the Forest—­Influence of the Forest on Humidity of Soil—­The Forest in Winter—­Summer Rain, Importance of—­Influence of the Forest on the Flow of Springs—­Influence of the Forest on Inundations and Torrents—­Destructive Action of Torrents—­Floods of the Ardeche—­Excavation by Torrents—­Extinction of Torrents—­Crushing Force of Torrents—­Transporting Power of Water—­The Po and its Deposits—­Mountain Slides—­Forest as Protection against Avalanches—­Minor Uses of the Forest—­Small Forest Plants and Vitality of Seeds—­Locusts do not Breed in Forests—­General Functions of Forest—­General Consequences of Destruction of—­Due Proportion of Woodland—­Proportion of Woodland in European Countries—­Forests of Great Britain—­Forests of France—­Forests of Italy—­Forests of Germany—­Forests of United States—­American Forest Trees—­European and American Forest Trees Compared—­The Forest does not furnish Food for Man—­First Removal of the Forest—­Principal Causes of Destruction of Forest—­Destruction and Protection of Forests by Governments—­Royal Forests and Game-laws—­Effects of the French Revolution—­Increased Demand for Lumber—­Effects of Burning Forest—­Floating of Timber—­Restoration of the Forest—­Economy of the Forest—­Forest
Legislation—­Plantation of Forests In America—­Financial Results of
Forest Plantations—­Instability of American Life

CHAPTER IV.

The waters.

Land Artificially Won from the Waters—­Great Works of Material Improvement—­Draining of Lincolnshire Fens—­Incursions of the Sea in the Netherlands—­Origin of Sea-dikes—­Gain and Loss of Land in the Netherlands—­Marine Deposits on the Coast of Netherlands—­Draining of Lake of Haarlem—­Draining of the Zuiderzee—­Geographical Effects of—­Improvements in the Netherlands—­Ancient Hydraulic Works—­Draining of Lake Celano by Prince Torlonia—­Incidental Consequences of Draining Lakes—­Draining of Marshes—­Agricultural Draining—­Meteorological Effects of Draining—­Geographical Effects of Draining—­Geographical Effects of Aqueducts and Canals—­Antiquity of Irrigation—­Irrigation in Palestine, India, and Egypt—­Irrigation in Europe—­Meteorological Effects of Irrigation—­Water withdrawn from Rivers for Irrigation—­Injurious Effects of Rice-culture—­Salts Deposited

Copyrights
The Earth as Modified by Human Action from Project Gutenberg. Public domain.

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