Personal Narrative Of Travels To The Equinoctial Regions Of America During The Years 1799-1804 - Volume 3 - By Alexander Von Humboldt And Aime Bonpland.
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I Found It At The Same Season Only 59.2 Degrees.
Has The Great Earthquake Of The 26th March, 1812, Had An Influence On
The Temperature Of These Springs?
The able chemists above mentioned
were, like myself, struck with the extreme purity of the hot waters
that issue from the primitive rocks of the basin of Aragua.
Those of
Onoto, which flow at the height of 360 toises above the level of the
sea, have no smell of sulphuretted hydrogen; they are without taste,
and cannot be precipitated, either by nitrate of silver or any other
re-agent. When evaporated they have an inappreciable residue which
consists of a little silica and a trace of alkali; their temperature
is only 44.5 degrees, and the bubbles of air which are disengaged at
intervals are at Onoto, as well as in the thermal waters of Mariara,
pure nitrogen. The waters of Mariara (244 toises) have a faint smell
of sulphuretted hydrogen; they leave, by evaporation, a slight
residuum, that yields carbonic acid, sulphuric acid, soda, magnesia
and lime. The quantities are so small that the water is altogether
without taste. In the course of my journey I found only the springs of
Cumangillas hotter than the thermal waters of Las Trincheras: they are
situated on the south of Porto Cabello. The waters of Comangillas are
at the height of 1040 toises and are alike remarkable for their purity
and their temperature of 96.3 degrees centigrade.), those of Las
Trincheras (90.4 degrees) on its southern slope and those of Onoto and
Mariara on its southern slope.
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