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Updated: June 16, 2025
If America south of 37 degs. were sunk beneath the waters of the ocean, these two birds might continue to exist in central Chile for a long period, but it is very improbable that their numbers would increase. We should then see a case which must inevitably have happened with very many animals.
His chair, placed on a carved gun-carriage, was modelled upon the powerful proportions of a 32-inch mortar; it was pointed at an angle of 90 degs., and hung upon trunnions so that the president could use it as a rocking-chair, very agreeable in great heat.
When at sea we had a constant succession of gales, and the current was against us: we drifted to 57 degs. 23' south. The surf was breaking fearfully on the coast, and the spray was carried over a cliff estimated to 200 feet in height.
Julian: in the morning, light winds with much rain, followed by a very heavy squall with rain, settled into heavy gale with large cumuli, cleared up, blowing very strong from S.S.W. Temperature 60 degs., dew-point 42 degs., difference 18 degs. Rengger, Natur. der Saeugethiere von Paraguay.
At Monte Video, from which we had just before sailed, in the twenty-three days included between the 26th of July and the 19th of August, the mean temperature from 276 observations was 58.4 degs.; the mean hottest day being 65.5 degs., and the coldest 46 degs. The lowest point to which the thermometer fell was 41.5 degs., and occasionally in the middle of the day it rose to 69 or 70 degs.
The heat and dust are then almost insupportable. The dust rises like a cloud obscuring even the opposite side of the street. Then the wind will as suddenly veer to the south. In an hour the temperature falls 40 or 50 degs., and the air is cleared by a "southerly buster." In the winter the north wind is a cold wind.
In Europe, the most southern glacier which comes down to the sea is met with, according to Von Buch, on the coast of Norway, in lat. 67 degs. Now, this is more than 20 degs. of latitude, or 1230 miles, nearer the pole than the Laguna de San Rafael. These facts are of high geological interest with respect to the climate of the northern hemisphere at the period when boulders were transported.
As the height of the plane of perpetual snow seems chiefly to be determined by the extreme heat of the summer, rather than by the mean temperature of the year, we ought not to be surprised at its descent in the Strait of Magellan, where the summer is so cool, to only 3500 or 4000 feet above the level of the sea; although in Norway, we must travel to between lat. 67 and 70 degs.
Now, it is known that in the shallow sea on the Arctic coast of America the bottom freezes, and does not thaw in spring so soon as the surface of the land, moreover at greater depths, where the bottom of the sea does not freeze the mud a few feet beneath the top layer might remain even in summer below 32 degs., as in the case on the land with the soil at the depth of a few feet.
He informs me, that in lat. 24 degs., in one day's march with the bullock-waggons, he saw, without wandering to any great distance on either side, between one hundred and one hundred and fifty rhinoceroses, which belonged to three species: the same day he saw several herds of giraffes, amounting together to nearly a hundred; and that although no elephant was observed, yet they are found in this district.
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