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 1
... actually carved out of the solid rock , silently and gently , by the agencies to which we have referred . " The tools , " to quote the words of Professor Geikie , " by which this great work has been done are of the simplest and most ...
... actually carved out of the solid rock , silently and gently , by the agencies to which we have referred . " The tools , " to quote the words of Professor Geikie , " by which this great work has been done are of the simplest and most ...
Página 4
... all occurred already , whereas in these other sciences effects actually taking place have to be explained . But this distinction is of no importance to our present purpose , for effects which have 4 CLIMATE AND TIME .
... all occurred already , whereas in these other sciences effects actually taking place have to be explained . But this distinction is of no importance to our present purpose , for effects which have 4 CLIMATE AND TIME .
Página 27
... actually , therefore , nearly one - half as much heat transferred from tropical regions by the Gulf - stream as is received from the sun by the entire arctic regions , the quantity conveyed from the tropics by the stream to that ...
... actually , therefore , nearly one - half as much heat transferred from tropical regions by the Gulf - stream as is received from the sun by the entire arctic regions , the quantity conveyed from the tropics by the stream to that ...
Página 28
... actually below the freezing - point . In fact , if those currents were warm , they would elevate the snow - line above themselves . The heated air rising off the hot burning ground at the equator , after ascending a few miles , becomes ...
... actually below the freezing - point . In fact , if those currents were warm , they would elevate the snow - line above themselves . The heated air rising off the hot burning ground at the equator , after ascending a few miles , becomes ...
Página 29
... actually far less . This proves the truth of the assertion that by far the greater part of the moisture of the torrid regions falls in those regions as rain . It will hardly do to object that the above may " Heat as a Mode of Motion ...
... actually far less . This proves the truth of the assertion that by far the greater part of the moisture of the torrid regions falls in those regions as rain . It will hardly do to object that the above may " Heat as a Mode of Motion ...
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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
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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...