Comparison with 1872 |
|
genus, by differences not greater than we see between the
natural and domestic varieties natural and domestic varieties 1872 |
varieties 1859 1860 1861 1866 1869 |
of the same species at the present day; and these parent-species, now generally extinct, have in their turn been similarly connected with more ancient
forms; forms; 1872 | species; 1859 1860 1861 1866 1869 |
and so on backwards, always converging to the common ancestor of each great class. So that the number of intermediate and transitional links, between all living and extinct species, must have been inconceivably great. But assuredly, if this theory be true, such have lived upon this
earth. |
On
the
lapse
of
Time
, as inferred from the rate of Deposition and extent of Denudation
.
Time
, as inferred from the rate of Deposition and extent of Denudation
. 1872 |
Time
.—
1859 1860 1861 |
Time, as inferred from the rate of Deposition and extent of Denudation
. 1866 |
Time, as inferred from the rate of Deposition and extent of Denudation
. 1869 |
|
Independently of our not finding fossil remains of such infinitely numerous connecting links, it may be
objected objected 1872 | objected, 1859 1860 1861 1866 1869 |
that time will not
have sufficed for so great an amount of organic change, all changes having been effected
....... 1872 | very 1859 1860 1861 1866 1869 |
slowly
through natural selection.
It is hardly possible for me
....... 1872 | even 1859 1860 1861 1866 1869 |
to recall to the
reader reader 1872 | reader, 1859 1860 1861 1866 1869 |
who may
not be
a practical geologist, the facts leading the mind feebly to comprehend the lapse of time. He who can read Sir Charles Lyell's grand work on the Principles of Geology, which the future historian will recognise as having produced a revolution in natural science,
and yet and yet 1872 | yet 1859 1860 1861 1866 1869 |
does not admit how incomprehensibly
vast have been the past periods of time, may at once close this volume. Not that it suffices to study the Principles of Geology, or to read special treatises by different observers on separate formations, and to mark how each author attempts to give an inadequate idea of the duration of each
formation, formation, 1872 | formation 1859 1860 1861 1866 1869 |
or even each
stratum. We can best gain some idea of past time by knowing the agencies at work, and learning how
deeply
the surface of the land has been denuded, and how much sediment has been deposited. As Lyell has well
|
genus, by differences not greater than we see between the
varieties varieties 1859 1860 1861 1866 1869 |
natural and domestic varieties 1872 |
of the same species at the present day; and these parent-species, now generally extinct, have in their turn been similarly connected with more ancient
species; species; 1859 1860 1861 1866 1869 | forms; 1872 |
and so on backwards, always converging to the common ancestor of each great class. So that the number of intermediate and transitional links, between all living and extinct species, must have been inconceivably great. But assuredly, if this theory be true, such have lived upon
the the 1861 1866 1869 1872 | this 1859 1860 |
earth. |
On
On
1866 1869 1872 |
On
1859 1860 1861 |
the
the
1866 1869 1872 |
the
1859 1860 1861 |
Lapse
Lapse
1866 1869 1872 |
lapse
1859 1860 1861 |
of
of
1866 1869 1872 |
of
1859 1860 1861 |
Time, as inferred from the rate of Deposition and extent of Denudation
.
Time, as inferred from the rate of Deposition and extent of Denudation
. 1869 |
Time
.—
1859 1860 1861 |
Time, as inferred from the rate of Deposition and extent of Denudation
. 1866 |
Time
, as inferred from the rate of Deposition and extent of Denudation
. 1872 |
|
Independently of our not finding fossil remains of such infinitely numerous connecting links, it may be
objected, objected, 1859 1860 1861 1866 1869 | objected 1872 |
that time
cannot cannot 1869 1872 | will not 1859 1860 1861 1866 |
have sufficed for so great an amount of organic change, all changes having been effected
very very 1859 1860 1861 1866 1869 | very 1872 |
slowly. slowly. 1869 1872 | slowly 1859 1860 1861 1866 |
....... 1869 1872 | through 1859 1860 1861 1866 |
....... 1869 1872 | natural 1859 1860 1861 1866 |
....... 1869 1872 | selection. 1859 1860 1861 1866 |
It is hardly possible for me
even even 1859 1860 1861 1866 1869 | even 1872 |
to recall to the
reader, reader, 1859 1860 1861 1866 1869 | reader 1872 |
who
is is 1869 1872 | may 1859 1860 1861 1866 |
not
....... 1869 1872 | be 1859 1860 1861 1866 |
a practical geologist, the facts leading the mind feebly to comprehend the lapse of time. He who can read Sir Charles Lyell's grand work on the Principles of Geology, which the future historian will recognise as having produced a revolution in natural science,
yet yet 1859 1860 1861 1866 1869 | and yet 1872 |
does not admit how
....... 1869 1872 | incomprehensibly 1859 1861 1866 | incomprehensively 1860 |
vast have been the past periods of time, may at once close this volume. Not that it suffices to study the Principles of Geology, or to read special treatises by different observers on separate formations, and to mark how each author attempts to give an inadequate idea of the duration of each
formation formation 1859 1860 1861 1866 1869 | formation, 1872 |
or even
of each of each 1869 1872 | each 1859 1860 1861 1866 |
stratum. We can best gain some idea of past time by knowing the agencies at work, and learning how
much of
the surface of the land has been denuded, and how much sediment has been deposited. As Lyell has well
|