Personal Narrative Of Travels To The Equinoctial Regions Of America During The Years 1799-1804 - Volume 1 - By Alexander Von Humboldt And Aime Bonpland.
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The Confervae,
While They Decompose The Carburetted Hydrogen, Also Shelter Worms
Which Hinder The Propagation Of Small Insects.
It had been believed
for ages, that the peninsula of Araya was entirely destitute of
springs of fresh water; but in 1797, after many useless researches,
the inhabitants of Maniquarez succeeded in discovering some.
In crossing the arid hills of Cape Cirial, we perceived a strong
smell of petroleum. The wind blew from the direction in which the
springs of this substance are found, and which were mentioned by
the first historians of these countries.* (* Oviedo terms it "A
resinous, aromatic, and medicinal liquor.") Near the village of
Maniquarez, the mica-slate* (* The Piedra pelada of the Creoles.)
comes out from below the secondary rock, forming a chain of
mountains from one hundred and fifty to one hundred and eighty
toises in height. The direction of the primitive rock near Cape
Sotto is from north-east to south-west; its strata incline fifty
degrees to the north-west. The mica-slate is silvery white, of
lamellar and undulated texture, and contains garnets. Strata of
quartz, the thickness of which varies from three to four toises,
traverse the mica-slate, as we may observe in several ravines
hollowed out by the waters. We detached with difficulty a fragment
of cyanite from a block of splintered and milky quartz, which was
isolated on the shore. This was the only time we found this
substance in South America.* (* In New Spain, the cyanite has been
discovered only in the province of Guatimala, at Estancia Grande,
- Del Rio Tablas Min. 1804 page 27.)
The potteries of Maniquarez, celebrated from time immemorial, form
a branch of industry which is exclusively in the hands of the
Indian women. The manufacture is still carried on according to the
method used before the conquest. It indicates both the infancy of
the art, and that unchangeability of manners which is
characteristic of all the natives of America. Three centuries have
been insufficient to introduce the potter's-wheel, on a coast which
is not above thirty or forty days' sail from Spain. The natives
have some confused notions with respect to the existence of this
machine, and they would no doubt make use of it if it were
introduced among them. The quarries whence they obtain the clay are
half a league to the east of Maniquarez. This clay is produced by
natural decomposition of a mica-slate reddened by oxide of iron.
The Indian women prefer the part most abounding in mica; and with
great skill fashion vessels two or three feet in diameter, giving
them a very regular curve. As they are not acquainted with the use
of ovens, they place twigs of desmanthus, cassia, and the
arborescent capparis, around the pots, and bake them in the open
air. To the east of the quarry which furnishes the clay is the
ravine of La Mina. It is asserted that, a short time after the
conquest, some Venetians extracted gold from the mica-slate.
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