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Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 2 by Alexander von Humboldt
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to long droughts; if the mountains should again become clothed with
forests, and great trees overshadow the shore and the plains of
Aragua, we should more probably see the volume of the waters augment,
and menace that beautiful cultivation which now trenches on the basin
of the lake.

While some of the cultivators of the valleys of Aragua fear the total
disappearance of the lake, and others its return to the banks it has
deserted, we hear the question gravely discussed at Caracas, whether
it would not be advisable, in order to give greater extent to
agriculture, to conduct the waters of the lake into the Llanos, by
digging a canal towards the Rio Pao. The possibility* of this
enterprise cannot be denied, particularly by having recourse to
tunnels, or subterranean canals. (The dividing ridge, namely, that
which divides the waters between the valleys of Aragua and the Llanos,
lowers so much towards the west of Guigue, as we have already
observed, that there are ravines which conduct the waters of the Cano
de Cambury, the Rio Valencia, and the Guataparo, in the time of
floods, to the Rio Pao; but it would be easier to open a navigable
canal from the lake of Valencia to the Orinoco, by the Pao, the
Portuguesa, and the Apure, than to dig a draining canal level with the
bottom of the lake. This bottom, according to the sounding, and my
barometric measurements, is 40 toises less than 222, or 182 above the
surface of the ocean. On the road from Guigue to the Llanos, by the
table-land of La Villa de Cura, I found, to the south of the dividing
ridge, and on its southern declivity, no point of level corresponding
to the 182 toises, except near San Juan. The absolute height of this
village is 194 toises. But, I repeat that, farther towards the west,
in the country between the Cano de Cambury and the sources of the Rio
Pao, which I was not able to visit, the point of level of the bottom
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