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
... MOLECULAR THEORY . Present State of the Question . - Heat necessary to the Motion of a Glacier . -Ice does not shear ... Molecules a Cause of Motion . - Internal molecular Pressure the chief Moving Power . - How Ice can excavate a Rock ...
... MOLECULAR THEORY . Present State of the Question . - Heat necessary to the Motion of a Glacier . -Ice does not shear ... Molecules a Cause of Motion . - Internal molecular Pressure the chief Moving Power . - How Ice can excavate a Rock ...
Página 22
... molecular theory of glacier motion - a theory which I have been led to modify considerably on one particular point . There is one point to which I wish particularly to direct attention - viz . , that I have studiously avoided ...
... molecular theory of glacier motion - a theory which I have been led to modify considerably on one particular point . There is one point to which I wish particularly to direct attention - viz . , that I have studiously avoided ...
Página 60
... molecules separate against the forces of cohesion binding them together into the solid form . No matter what the inten- sity of the sun's heat may be , the surface of the ground will remain permanently at 32 ° so long as the snow and ...
... molecules separate against the forces of cohesion binding them together into the solid form . No matter what the inten- sity of the sun's heat may be , the surface of the ground will remain permanently at 32 ° so long as the snow and ...
Página 99
... molecules that are specific- ally heavier descend and displace those that are specifically lighter . If , for example , the ocean at the equator be expanded by heat or by any other cause , it will be forced by the denser waters in ...
... molecules that are specific- ally heavier descend and displace those that are specifically lighter . If , for example , the ocean at the equator be expanded by heat or by any other cause , it will be forced by the denser waters in ...
Página 100
... molecules will not be in equilibrium . The molecules at the surface in this case may be regarded as lying on an inclined plane sloping from the equator down to the poles , and as these molecules are at liberty to move they will not ...
... molecules will not be in equilibrium . The molecules at the surface in this case may be regarded as lying on an inclined plane sloping from the equator down to the poles , and as these molecules are at liberty to move they will not ...
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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...