The effects of a great drought in the Pampas are thus described. “The period included between the years 1827 and 1830 is called the ‘gran seco’ or the great drought. During this time so little rain fell, that the vegetation, even to the thistles, failed; the brooks were dried up, and the whole country assumed the appearance of a dusty high road. This was especially the case in the northern part of the province of Buenos Ayres, and the southern part of St. Fe. Very great numbers of birds, wild animals, cattle, and horses,
perished from the want of food and water. A man told me that the deer used to come into his courtyard to the well which he had been obliged to dig to supply his own family with water; and that the partridges had hardly strength to fly away when pursued. The lowest estimation of the loss of cattle in the province of Buenos Ayres alone, was taken at one million head. A proprietor at San Pedro had previously to these years 20,000 cattle; at the end not one remained. San Pedro is situated in the midst of the finest country, and even now again abounds with animals; yet, during the latter part of the ‘gran seco’ live cattle were brought in vessels for the consumption of the inhabitants. The animals roamed from their estancias, and wandering far to the southward, were mingled together in such multitudes that a government commission was sent from Buenos Ayres to settle the disputes of the owners. Sir Woodbine Parish informed me of another and very curious source of dispute; the ground being so long dry, such quantities of dust were blown about, that in this open country the landmarks became obliterated, and people could not tell the limits of their estates.
“I was informed by an eye-witness, that the cattle in herds of thousands rushed into the river Parana, and being exhausted by hunger they were unable to crawl up the muddy banks, and thus were drowned. The arm which runs by San Pedro was so full of putrid carcasses, that the master of a vessel told me, that the smell rendered it quite impossible to pass that way. Without doubt, several hundred thousand animals thus perished in the river. Their bodies, when putrid, floated down the stream, and many in all probability were deposited in the estuary of the Plata. All the small rivers became highly saline, and this caused the death of vast numbers in particular spots, for when an animal drinks of such water it does not recover. I noticed, but probably it was the effect of a gradual increase, rather than of any one period, that the smaller streams in the Pampas were paved with bones. Subsequently to this unusual drought, a very rainy season commenced, which caused great floods. Hence it is almost certain, that some thousands of these skeletons were buried by the deposits of the very next year. What would be the opinion of a geologist viewing such an enormous collection of bones, of all kinds
of animals and of all ages, thus embedded in one thick earthy mass? Would he not attribute it to a flood having crept over the surface of the land, rather than to the common order of things?”
Captain Owen mentions a curious effect of a drought on the elephants at Benguela on the western coast of Africa:—“A number of these animals had some time since entered the town in a body to possess themselves of the wells, not being able to procure any water in the country. The inhabitants mustered, when a desperate conflict ensued, which terminated in the ultimate discomfiture of the invaders, but not until they had killed one man, and wounded several others.” The town is said to have a population of nearly three thousand. Dr. Malcolmson states, that during a great drought in India the wild animals entered the tents of some troops at Ellore, and that a hare drank out of a vessel held by the adjutant of the regiment.
In connexion with droughts may be mentioned a plan [133] proposed by Mr. Espy of the United States of America, for remedying them by means
of artificial rains. That gentleman says, that if a large body of heated air be made to ascend in a column, a large cloud will be generated, and that such cloud will contain in itself a self-sustaining power, which may move from the place over which it was formed, and cause the air over which it passes to rise up into it and thus form more cloud and rain, until the rain may become general.
It is proposed to form this ascending column of air by kindling large fires which, Mr. Espy says, are known to produce rain. Humboldt speaks of a mysterious connexion between volcanoes and rain, and says that when a volcano bursts out in South America in a dry season, it sometimes changes it to a rainy one. The Indians of Paraguay, when their crops are threatened by drought, set fire to the vast plains with the intention of producing rain. In Louisiana, heavy rains have been known from time immemorial to succeed the conflagration of the prairies; and the inhabitants of Nova Scotia bear testimony to a similar result from the burning of their forests. Great battles are said to produce rain, and it is even stated that the spread of manufactures in a particular district deteriorates the climate of such district, the ascending
current occasioned by the tall chimney of every manufactory tending to produce rain. In Manchester, for example, it is said to rain six days out of seven.
