Here then an increaseof seven degrees in mean temperature, but a greater one of extremeheat, was sufficient to awake the functions of life. I am informed that this same characteris common to the cities on the great Mexican platform. Strait of Magellan--Port Famine--Ascent of Mount Tarn-- Forests--Edible fungus--Zoology--Great Seaweed--Leave Tierra del Fuego--Climate--Fruit-trees and productions of the southern coasts--Height of snow-line on the Cordillera-- Descent of glaciers to the sea--Icebergs formed--Transportal of boulders--Climate and productions of the Antarctic Islands --Preservation of frozen carcasses--Recapitulation. Papilio feronia. D. The north-west winds prevailing for the next four days, we onlymanaged to cross a great bay, and then anchored in another secureharbour. The valley soon began to narrow, andthe sides to grow lofty and more precipitous. In these upper beds shells are tolerably frequent; and theybelong to about the period of the lower chalk of Europe. Fear of man an acquired instinct. In the European division of the world, we must look backto the tertiary epochs, to find a condition of things among themammalia, resembling that now existing at the Cape of Good Hope. Structure of the land. Some of the New Zealandforests must be impenetrable to an extraordinary degree. Since our voyage, M. Electricity of atmosphere within Andes. During the former voyage the Fuegians werehere very troublesome, and to frighten them a rocket was fired atnight over their wigwams; it answered effectually, and one of theofficers told me that the clamour first raised, and the barking ofthe dogs, was quite ludicrous in contrast with the profound silencewhich in a minute or two afterwards prevailed. NOVEMBER 26, 1834. However this may be, it is truly wonderful andbeautiful to see so great a bird, hour after hour, without anyapparent exertion, wheeling and gliding over mountain and river.
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