 | Alexander von Humboldt, Aimé Bonpland - 1819 - 590 páginas
...disused, throug^ the air, bjut,, because, by sheltering, the soil from the direct actiqn of^he^un, they diminish the evaporation of the water produced...no longer impeded in their course : and instead of sloAvly augmenting the level of the rivers by progressive nitrations, they furrow during heavy showers... | |
 | Alexander von Humboldt, Aimé Bonpland - 1825 - 602 páginas
...through the air, but because, by sheltering the soil from the direct action of the Sun, they dimmish the evaporation of the water produced by rain. When...augmenting the level of the rivers by progressive nitrations, they furrow during heavy showers the sides of the hills, bear down the loosened soil, and... | |
 | Bombay Geographical Society - 1850 - 502 páginas
...diminish the evaporation of the water produced by rain. When forests are destroyed, as they are everywhere in America by the European planters with an imprudent...and instead of slowly augmenting the level of the riviTS by progressive filtration, they furrow during heavy showers the sides of the hills, bear duwu... | |
 | 1852 - 446 páginas
...of the year, are converted into torrents whenever great rains fall on the heights. The sward and the moss disappearing with the brushwood from the sides...augmenting the level of the rivers by progressive filtration, they furrow, during heavy showers, the sides of the hills, bear down the loosened soil,... | |
 | 1851 - 406 páginas
...on the heights. The sward and moss disappearing with the brushwood from the sides of the mountain, the waters falling in rain, are no longer impeded...augmenting the level of the rivers by progressive filtration, they furrow during heavy showers the sides of the hills, bear down the loosened soil, and... | |
 | 1851 - 438 páginas
...on the heights. The sward and moss disappearing with the brushwood from the sides of the mountain, the waters falling in rain, are no longer impeded...augmenting the level of the rivers by progressive filtration, they furrow during heavy showers the sides of the hills, bear down the loosened soil, and... | |
 | 1852 - 460 páginas
...of the year, are converted into torrents whenever great rains fall on the heights. The sward and the moss disappearing with the brushwood from the sides...augmenting the level of the rivers by progressive filtration, they furrow, during heavy showers, the sides of the hills, bear down the loosened soil,... | |
 | 1852 - 450 páginas
...of the year, are converted into torrents whenever great rains fall on the heights. The sward and the moss disappearing with the brushwood from the sides...augmenting the level of the rivers by progressive filtration, they furrow, during heavy showers, the sides of the hills, bear down the loosened soil,... | |
 | Alexander von Humboldt, Aimé Bonpland - 1852 - 538 páginas
...are converted into torrents whenever great rains fall on the heights. As the sward and moss disappear with the brushwood from the sides of the mountains,...augmenting the level of the rivers by progressive nitrations, they furrow, during heavy showers, the sides of the hills, bearing down the loosened soil,... | |
 | American Institute of the City of New York - 1854 - 584 páginas
...of the year, are converted into torrents whenever great rains fall on the heights. The sward and the moss disappearing with the brushwood from the sides...augmenting the level of the rivers by progressive nitration, they furrow, during heavy showers, the sides of the hills, bear down the loosened soil,... | |
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European planters, with an imprudent precipitation, the springs are entirely dried up, or become less abundant. The beds of the rivers, remaining dry during a part of the year, are converted into torrents, whenever great rains fall on the heights. The... 
