Gilbert's Geography for families and schools |
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Gilbert's Geography for Families and Schools James Gilbert (Publisher ) Sin vista previa disponible - 2016 |
Términos y frases comunes
Africa Alps amounts Arctic Arctic Ocean Asia Atlantic Ocean Australia Austria Black Sea bounded breadth Britain British Cape capital Caspian Sea climate coast colonies commercial comprising an area considerable consists contains distance district Ditto divided dominion earth east longitude east to west eastern Egypt elevated empire England English equator estimated Europe European extent extreme feet France GILBERT'S greatest length Gulf hemisphere immense Indian inhabitants interior Ireland islands Isle Karamania kingdom lakes land latitude latter longitude Magindanao manufactures Maps Mediterranean Mediterranean Sea meridian miles in length Moldavia mountains nation navigation nearly north latitude north to south northern Pacific Pacific Ocean peninsula Persia Pocket Guide population Port Portugal possessing Price principal rivers principal towns produce province Pyrenees regions respectively Russia Scotland situated snow South America southern Spain square miles superficies surface territory tion trade tropics vegetation Wales western whole
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Página 50 - It is bounded on the North by the Arctic Ocean ; on the East by the Pacific Ocean ; on the South by the Indian Ocean ; and on the West by the Red Sea, the Mediterranean Sea, the Caspian Sea, and the Oural Mountains.
Página 19 - ... the sea into it with great force. Such inundations are very sudden, and sometimes also extensive, but they are of short duration. In adverting to the advantages which a country derives from its rivers, we must first observe that the water is extensively used for the purposes of domestic economy. It is much purer than that of wells ; for, with the exception of a few which are salt or brackish, river water contains only earthy particles in suspension, which may easily be separated by filtration,...
Página 2 - Containing a concise Treatise on the Nature and Application of Mechanical Forces, the Action of Gravity, the Elements of Machinery, the Strength, Pressure, and Resistance of Materials, &c., &c. Compiled and arranged by Thomas Kelt. To which is added, Valuable Hints to Mechanics on various Subjects, by John Frost, LL.
Página 18 - ... inundations are increased by the mass of earthy materials of which the embankments consist, and which are dispersed over the adjacent lands. In some rivers these inundations last only from two to four weeks ; in others two or three months; and in some even five or six months. Where the inundations are long, they are less violent, and cause less damage than where they are short ; in the latter case the whole mass of water suddenly deluges the country, while in the former the water rises slowly....
Página 19 - Slates of North America are generally provided with abundance of streams, a circumstance which favours the establishment of manufactures. The greatest advantages however which a country derives from its rivers are the facilities which they supply for conveying the produce of agriculture and of manufacturing industry to distant parts at a moderate expense. In this respect the rivers maybe compared to the arteries and veins of the human body, which diffuse life and strength through all parts.
Página 19 - ... of small elevation, and they do not traverse a mountain-region. The rivers of England supply the means of an extensive system of inland navigation, a circumstance partly due to their small fall, their sources being only a few hundred feet higher than their mouth, and partly to the abundant supply of water from rain, mists, and springs. Accordingly, if two rivulets unite, they generally form a small navigable river ; and such as are not navigable become useful as feeders to canals. The navigation...
Página 2 - THE MECHANIC'S TEXT BOOK, AND ENGINEER'S PRACTICAL GUIDE. Containing a concise Treatise on the Nature and Application of mechanical Forces; Action of Gravity; the Elements of Machinery; Rules and Tables for calculating the working Effects of...
Página 18 - ... cause inundations. All large rivers that drain countries of which the mean winter temperature is below 30°, are annually subject to great risings when the snow and ice melt. In such countries snow falls for several months, and as only a small part of it is dissolved, it accumulates to a great amount. As soon as the frost ceases, the snow begins to melt, and runs off by the smaller rivers, which suddenly swell and carry an unusual supply of water to the principal river, whose volume, being thus...
Página 20 - ... all rivers which have water enough to carry the smallest boats of any shape or form are navigated, except where the nature of the current opposes insuperable obstacles. These obstacles consist of cataracts or of rapids. When, the river descends from a rock which rises several feet perpendicularly, it rushes down in a broken sheet of water, and is said to form a cataract. When the water descends with great velocity over an inclined plane of rock, it is said to form a rapid. A cataract may be descended...
Página 20 - ... not rain at all, or in which rain occurs only at a certain period of the year, and even then only for two or three months. The first class of such countries, for instance the western coast of South America between 5° and 28" S. lat., would be uninhabitable but for the rivers which descend from the western declivity of the Andes, and in their course to the sea have furrowed the surface with deep depressions or valleys, in which agriculture is carried on with success as far as the water of the...