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 vi
... passing through the press . To the kindness of Mr. James Bennie I am in- debted for the copious index at the end of the volume , as well as for many of the facts relating to the glacial deposits of the West of Scotland . JAMES CROLL ...
... passing through the press . To the kindness of Mr. James Bennie I am in- debted for the copious index at the end of the volume , as well as for many of the facts relating to the glacial deposits of the West of Scotland . JAMES CROLL ...
Página 7
... passing through different parts of space ; but space itself is not a sub- * Athenæum , September 22 , 1860 . + Trans . Glasgow Geol . Soc . , vol . iv . , p . 313 . stance which can possibly be either cold or hot . 2 INTRODUCTION . 7.
... passing through different parts of space ; but space itself is not a sub- * Athenæum , September 22 , 1860 . + Trans . Glasgow Geol . Soc . , vol . iv . , p . 313 . stance which can possibly be either cold or hot . 2 INTRODUCTION . 7.
Página 11
... passing over equal angles round it , in whatever part of the ellipse those angles may be situated . Those angles will of course be de- scribed in unequal times , but the greater proximity of the sun exactly compensates for the more ...
... passing over equal angles round it , in whatever part of the ellipse those angles may be situated . Those angles will of course be de- scribed in unequal times , but the greater proximity of the sun exactly compensates for the more ...
Página 24
... passing through that section in a given time . But although we can obtain with tolerable accu- racy the mean temperature , yet observations regarding the velocity of the water at all depths have unfortunately not been made at any ...
... passing through that section in a given time . But although we can obtain with tolerable accu- racy the mean temperature , yet observations regarding the velocity of the water at all depths have unfortunately not been made at any ...
Página 25
... passes into the arctic regions , will be cooled far below 40 ° , probably below 30 ° . Hence I cannot be over - estimating the extent to which the water of the Gulf - stream is cooled down in fixing upon 40 ° as the average minimum ...
... passes into the arctic regions , will be cooled far below 40 ° , probably below 30 ° . Hence I cannot be over - estimating the extent to which the water of the Gulf - stream is cooled down in fixing upon 40 ° as the average minimum ...
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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...