Climate and Time in Their Geological Relations: A Theory of Secular Changes of the Earth's ClimateD. Appleton, 1875 - 577 páginas |
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Página xvi
... Slope . - How deep River Valleys are striated across . - A remarkable Example in the Valley of the Tay . - How Boulders can be carried from a lower to a higher Level PAGE 514 · APPENDIX . I. Opinions expressed previous to 1864 regarding ...
... Slope . - How deep River Valleys are striated across . - A remarkable Example in the Valley of the Tay . - How Boulders can be carried from a lower to a higher Level PAGE 514 · APPENDIX . I. Opinions expressed previous to 1864 regarding ...
Página 116
... slope of 1-28th of an inch per geographical mile , or 1-32nd of an inch per statute mile for the water so raised to run down . As the accelerating force corresponding to such a slope ( of 1-10th of a second , 0 " -1 ) is less than one ...
... slope of 1-28th of an inch per geographical mile , or 1-32nd of an inch per statute mile for the water so raised to run down . As the accelerating force corresponding to such a slope ( of 1-10th of a second , 0 " -1 ) is less than one ...
Página 118
... slope resulting from difference of specific gravity , as we shall presently see , does not amount to 10 feet . Herschel's estimate was , however , made on insufficient data , both as to the rate of expansion of sea - water and that at ...
... slope resulting from difference of specific gravity , as we shall presently see , does not amount to 10 feet . Herschel's estimate was , however , made on insufficient data , both as to the rate of expansion of sea - water and that at ...
Página 119
... slope of 4 feet in 6,200 will amount to only 1-7,340,000th that of gravity , or about 1-1000th of a grain on a pound of water . But , as we shall shortly see , there can be no permanent current resulting from difference of temperature ...
... slope of 4 feet in 6,200 will amount to only 1-7,340,000th that of gravity , or about 1-1000th of a grain on a pound of water . But , as we shall shortly see , there can be no permanent current resulting from difference of temperature ...
Página 120
... slope from the equator to the poles , a force which does not much exceed the weight of a grain on a ton of water . But it must be observed that this force of a grain per ton would affect only the water at the surface ; a very short ...
... slope from the equator to the poles , a force which does not much exceed the weight of a grain on a ton of water . But it must be observed that this force of a grain per ton would affect only the water at the surface ; a very short ...
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Términos y frases comunes
amount of heat antarctic aphelion arctic regions Atlantic beds bottom boulder clay Caithness Carboniferous cause centre of gravity channel coal cold periods condition of climate consequently considerable denudation deposits depth descend earth's orbit eccentricity ecliptic effect Eocene equator evidence existence extent fact feet flow foot-pounds force Geikie Geol geological geologists glacial epoch glacier globe Grangemouth gravel greater Greenland Gulf-stream heat received ice-cap icebergs inter-glacial periods island James Geikie Kilsyth land land-ice latitude lower mass mean melting miles Miocene molecules motion North North Sea northern obliquity ocean ocean-currents perihelion polar column polar regions poles present probably produce Professor quantity of heat radiation regarding result river rocks sand says Scotland sea-bottom sea-level shear Sir Charles Lyell slope snow southern hemisphere specific gravity stones stratified stream striated submergence summer sun's supposed surface theory thickness tion valley warm periods winter
Pasajes populares
Página 331 - ... been removed from the general surface in one year ; and there seems no danger of our overrating the mean rate of waste by selecting the Mississippi as our example, for that river drains a country equal to more than half the continent of Europe, extends through twenty degrees of latitude, and therefore through regions enjoying a great variety of climate, and some of its tributaries descend from mountains of great height. The Mississippi is also more likely to afford us a fair test of ordinary...
Página 535 - Now, the perihelion of the orbit is situated nearly at the place of the northern winter solstice ; so that, were it not for the compensation we have just described, the effect would be to exaggerate the difference of summer and winter in the southern hemisphere, and to moderate it in the northern ; thus producing a more violent alternation of climate in the one hemisphere, and an approach to perpetual spring in the other. As it is, however, no such inequality subsists, but an equal and impartial...