Personal Narrative Of Travels To The Equinoctial Regions Of America During The Years 1799-1804 - Volume 2 - By Alexander Von Humboldt And Aime Bonpland.
- Page 114 of 208 - First - Home
"What Would These Animals Eat, If
We Did Not Pass This Way?" Say The Creoles, In Going Through Countries
Where
There are only crocodiles covered with a scaly skin, and hairy
monkeys.) the activity of the venom varying in the
Same species, are
very remarkable facts; which find their analogy, however, in the
classes of large animals. The crocodile of Angostura pursues men,
while at Nueva Barcelona you may bathe tranquilly in the Rio Neveri
amidst these carnivorous reptiles. The jaguars of Maturin, Cumanacoa,
and the isthmus of Panama, are timid in comparison of those of the
Upper Orinoco. The Indians well know that the monkeys of some valleys
are easily tamed, while others of the same species, caught elsewhere,
will rather die of hunger than submit to slavery.* (* I might have
added the example of the scorpion of Cumana, which it is very
difficult to distinguish from that of the island of Trinidad, Jamaica,
Carthagena, and Guayaquil; yet the former is not more to be feared
than the Scorpio europaeus (of the south of France), while the latter
produces consequences far more alarming than the Scorpio occitanus (of
Spain and Barbary). At Carthagena and Guayaquil, the sting of the
scorpion (alacran) instantly causes the loss of speech. Sometimes a
singular torpor of the tongue is observed for fifteen or sixteen
hours. The patient, when stung in the legs, stammers as if he had been
struck with apoplexy.)
The common people in America have framed systems respecting the
salubrity of climates and pathological phenomena, as well as the
learned of Europe; and their systems, like ours, are diametrically
opposed to each other, according to the provinces into which the New
Continent is divided. At the Rio Magdalena the frequency of mosquitos
is regarded as troublesome, but salutary. These animals, say the
inhabitants, give us slight bleedings, and preserve us, in a country
excessively hot, from the scarlet fever, and other inflammatory
diseases. But at the Orinoco, the banks of which are very
insalubrious, the sick blame the mosquitos for all their sufferings.
It is unnecessary to refute the fallacy of the popular belief that the
action of the mosquitos is salutary by its local bleedings. In Europe
the inhabitants of marshy countries are not ignorant that the insects
irritate the epidermis, and stimulate its functions by the venom which
they deposit in the wounds they make. Far from diminishing the
inflammatory state of the skin, the stings increase it.
The frequency of gnats and mosquitos characterises unhealthy climates
only so far as the development and multiplication of these insects
depend on the same causes that give rise to miasmata. These noxious
animals love a fertile soil covered with plants, stagnant waters, and
a humid air never agitated by the wind; they prefer to an open country
those shades, that softened day, that tempered degree of light, heat,
and moisture which, while it favours the action of chemical
affinities, accelerates the putrefaction of organised substances. May
not the mosquitos themselves increase the insalubrity of the
atmosphere? When we reflect that to the height of three or four toises
a cubic foot of air is often peopled by a million of winged insects,*
(* It is sufficient to mention, that the cubic foot contains 2,985,984
cubic lines.) which contain a caustic and venomous liquid; when we
recollect that several species of culex are 1.8 lines long from the
head to the extremity of the corslet (without reckoning the legs);
lastly, when we consider that in this swarm of mosquitos and gnats,
diffused in the atmosphere like smoke, there is a great number of dead
insects raised by the force of the ascending air, or by that of the
lateral currents which are caused by the unequal heating of the soil,
we are led to inquire whether the presence of so many animal
substances in the air must not occasion particular miasmata. I think
that these substances act on the atmosphere differently from sand and
dust; but it will be prudent to affirm nothing positively on this
subject. Chemistry has not yet unveiled the numerous mysteries of the
insalubrity of the air; it has only taught us that we are ignorant of
many things with which a few years ago we believed we were acquainted.
Daily experience appears in a certain degree to prove the fact that at
the Orinoco, Cassiquiare, Rio Caura, and wherever the air is very
unhealthy, the sting of the mosquito augments the disposition of the
organs to receive the impression of miasmata. When you are exposed day
and night, during whole months, to the torment of insects, the
continual irritation of the skin causes febrile commotions; and, from
the sympathy existing between the dermoid and the gastric systems,
injures the functions of the stomach. Digestion first becomes
difficult, the cutaneous inflammation excites profuse perspirations,
an unquenchable thirst succeeds, and, in persons of a feeble
constitution, increasing impatience is succeeded by depression of
mind, during which all the pathogenic causes act with increased
violence. It is neither the dangers of navigating in small boats, the
savage Indians, nor the serpents, crocodiles, or jaguars, that make
Spaniards dread a voyage on the Orinoco; it is, as they say with
simplicity, "el sudar y las moscas," (the perspiration and the flies).
We have reason to believe that mankind, as they change the surface of
the soil, will succeed in altering by degrees the constitution of the
atmosphere. The insects will diminish when the old trees of the forest
have disappeared; when, in those countries now desert, the rivers are
seen bordered with cottages, and the plains covered with pastures and
harvests.
Whoever has lived long in countries infested by mosquitos will be
convinced, as we were, that there exists no remedy for the torment of
these insects. The Indians, covered with anoto, bolar earth, or turtle
oil, are not protected from their attacks. It is doubtful whether the
painting even relieves: it certainly does not prevent the evil.
Europeans, recently arrived at the Orinoco, the Rio Magdalena, the
river Guayaquil, or Rio Chagres (I mention the four rivers where the
insects are most to be dreaded) at first obtain some relief by
covering their faces and hands, but they soon feel it difficult to
endure the heat, are weary of being condemned to complete inactivity,
and finish with leaving the face and hands uncovered.
Enter page number
PreviousNext
Page 114 of 208
Words from 115303 to 116367
of 211397