Climate and Time in Their Geological Relations: A Theory of Secular Changes of the Earth's ClimateD. Appleton, 1875 - 577 páginas |
Dentro del libro
Resultados 1-5 de 72
Página xvi
... Moving Power . - How Ice can excavate a Rock Basin . - How Ice can ascend a 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 ...
... Moving Power . - How Ice can excavate a Rock Basin . - How Ice can ascend a 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 ...
Página 25
... moving water is not under 65 ° at the moment of leaving the Gulf . But to prevent the possibility of any objec- tions being raised on the grounds that I may have over - esti- mated the volume of the stream , I shall take the velocity to ...
... moving water is not under 65 ° at the moment of leaving the Gulf . But to prevent the possibility of any objec- tions being raised on the grounds that I may have over - esti- mated the volume of the stream , I shall take the velocity to ...
Página 27
... moving with the same velocity . Taking , as before , the width of the stream at fifty miles , and its depth at 1,000 feet , and its velocity at two miles an hour , it follows that , in order to convey an equal amount of heat from the ...
... moving with the same velocity . Taking , as before , the width of the stream at fifty miles , and its depth at 1,000 feet , and its velocity at two miles an hour , it follows that , in order to convey an equal amount of heat from the ...
Página 31
... so comparatively small as the Gulf - stream , after spreading out over such a large area of the Atlantic , and moving so slowly across to the shores of Europe , losing heat all the way , would not be able 3 DISTRIBUTION OF HEAT . 31.
... so comparatively small as the Gulf - stream , after spreading out over such a large area of the Atlantic , and moving so slowly across to the shores of Europe , losing heat all the way , would not be able 3 DISTRIBUTION OF HEAT . 31.
Página 32
... move as rapidly along its whole course as it does in the Straits of Florida , it could produce no sensible effect on the climate of Europe . It does not require much consideration to perceive this . ( 1 ) If the stream during its course ...
... move as rapidly along its whole course as it does in the Straits of Florida , it could produce no sensible effect on the climate of Europe . It does not require much consideration to perceive this . ( 1 ) If the stream during its course ...
Otras ediciones - Ver todas
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...