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 4
... course , equally true of all sciences , in which the things to be considered stand in the relationship of cause and effect . Geology is no exception . It is not like systematic botany , a mere science of classification . It has to ...
... course , equally true of all sciences , in which the things to be considered stand in the relationship of cause and effect . Geology is no exception . It is not like systematic botany , a mere science of classification . It has to ...
Página 11
... course be de- scribed in unequal times , but the greater proximity of the sun exactly compensates for the more rapid description , and thus an equilibrium of heat is maintained . The sun , for example , is much nearer the earth when he ...
... course be de- scribed in unequal times , but the greater proximity of the sun exactly compensates for the more rapid description , and thus an equilibrium of heat is maintained . The sun , for example , is much nearer the earth when he ...
Página 14
... course occur in perihelion . Until attention was directed to those physical circumstances to which I refer , it was impossible that the true cause of the glacial epoch could have been discovered ; and , moreover , many of the in- direct ...
... course occur in perihelion . Until attention was directed to those physical circumstances to which I refer , it was impossible that the true cause of the glacial epoch could have been discovered ; and , moreover , many of the in- direct ...
Página 17
... course , would tend to neutralize or counteract that difference of temperature between the two hemispheres which had been previously pro- duced by eccentricity . In short , this theory of circulation . would effectually prevent ...
... course , would tend to neutralize or counteract that difference of temperature between the two hemispheres which had been previously pro- duced by eccentricity . In short , this theory of circulation . would effectually prevent ...
Página 29
... course , that it is 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 ...
... course , that it is 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 ...
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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...