Outlines of Physical Geography

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Ivison & Phinney, 1859 - 225 páginas
 

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Página 15 - Hudson, the Green Mountains of Vermont, and the White Mountains of New Hampshire.
Página 182 - ... is the only one which is naked, and the only one which can clothe itself. This is one of the properties which renders him an animal of all climates, and of all seasons. He can adapt the warmth or lightness of his covering to the temperature of his habitation. Had he been born with a fleece upon his back, although he might have been comforted by its warmth in high latitudes, it would have oppressed him by its weight and heat, as the species spread towards the equator.
Página 9 - ... invisible. These animals are of a great variety of shapes and sizes, and in such prodigious numbers, that, in a short time, the whole surface of the rock appears to be alive and in motion. The most common...
Página 9 - The surrounding parts, however, advance in succession till they reach the surface, where they also must stop. Thus, as the level of the highest tide is the eventual limit to every part of the reef, a horizontal field comes to be formed coincident with that plane, and perpendicular on all sides. The reef, however, continually increases, and being prevented from going higher, must extend itself laterally in all directions...
Página 182 - The sacred Scriptures, whose testimony is received by all men of unclouded minds with implicit and reverential assent, declare that it pleased the Almighty Creator to make of one blood all the nations of the earth, and that all mankind are the offspring of common parents.
Página 7 - The long ocean swell being suddenly impeded by this barrier, lifted itself in one great continuous ridge of deep blue water, which, curling over, fell on the edge of the reef in an unbroken cataract of dazzling white foam. Each line of breaker ran often one or two miles in length with not a perceptible gap in its continuity.
Página 41 - ... is thus formed and carried down into the lower regions In 1797, valleys, a thousand feet wide, surrounding Tunguragua, in Quito, were filled with mud from this source to a depth of six hundred feet. 157. VOLCANOES OF NORTH AMERICA. — Proceeding north from the Isthmus of Panama, we find extensive volcanoes scattered through Central America and Mexico. Coseguina, in the former country, was in eruption in 1835, and some of its ashes fell at Truxillo, on the shores of tile Gulf of Mexico.
Página 9 - ... and from four to five inches long, and two or three round. When the rock was broken from a spot near the level of high water, it was found to be a hard, solid stone; but if any part of it were detached at a level to which the tide reached every...
Página 195 - ... the Gulf Stream, and other great currents of the sea. From the parallel of about 30° North and South, nearly to the equator, we have two zones of perpetual winds, viz : the zone of northeast trades on this side, and of southeast on that. They blow perpetually, and are as steady and as constant as the current of the Mississippi river — always moving in the same direction. As these two currents of air are constantly flowing...
Página 9 - But this growth being as rapid at the upper edge as it is lower down, the steepness of the face of the reef is still preserved. These are the circumstances which render coral reefs so dangerous in navigation ; for, in the first place, they are seldom seen above the water ; and, in the next, their sides are so steep, that a ship's bows may strike against the rock before any change of soundings has given warning of the danger.

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