Comparison with 1859 |
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Text in this page (from paragraph 1000, sentence 810, word 14 to paragraph 1000, sentence 810, word 49) is not present in 1859 |
Widely Widely 1859 1860 1861 |
It is the dominant and widely 1866 1869 1872 |
ranging species
vary vary 1859 1860 1861 |
which vary most frequently and vary 1866 1869 1872 |
most, and varieties are often at first
local,— local,— 1859 1860 | local— 1861 1866 1869 1872 |
both causes rendering the discovery of intermediate links
less less 1859 1860 1861 |
in any one formation less 1866 1869 1872 |
likely. Local varieties will not spread into other and distant regions until they are considerably modified and
im- im- 1859 1860 | im- 1861 1866 1869 1872 |
proved; proved; 1859 1860 | improved; 1861 1866 1869 1872 |
and when they
do do 1859 1860 1861 1866 | have 1869 1872 |
spread,
if if 1859 1860 1861 1866 | and are 1869 1872 |
discovered in a geological formation, they
will will 1859 1860 1861 1866 1869 | will 1872 |
appear as if suddenly created there, and will be simply classed as new species. Most formations have been
intermittent in their accumulation; and their
duration, duration, 1859 1860 1861 | duration 1866 1869 1872 |
I am inclined to believe, has I am inclined to believe, has 1859 1860 1861 |
has probably 1866 1869 1872 |
been shorter than the average duration of specific forms. Successive formations are
separated separated 1859 1860 |
in most cases separated 1861 1866 1869 1872 |
from each other by
enormous enormous 1859 1860 1861 1866 | enormous 1869 1872 |
blank intervals of
time; time; 1859 1860 1861 1866 | time 1869 1872 |
for for 1859 1860 1861 1866 |
of great length; for 1869 1872 |
fossiliferous
formations, formations, 1859 1860 | formations 1861 1866 1869 1872 |
thick enough to resist future
degradation, degradation, 1859 1860 | degradation 1861 1866 1869 1872 |
can
be be 1859 1860 |
generally be 1861 1866 |
as a general rule be 1869 1872 |
accumulated only where much sediment is deposited on the subsiding bed of the sea. During the alternate periods of elevation and of stationary level the record will
be be 1859 1860 1861 1866 | generally be 1869 1872 |
blank. During these latter periods there will probably be more variability in the forms of life; during periods of subsidence, more extinction. |
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With respect to the absence
of fossiliferous formations of fossiliferous formations 1859 1860 1861 |
of strata rich in fossils 1869 1872 |
OMIT 1866 |
beneath the
lowest Silurian strata, lowest Silurian strata, 1859 1860 1861 |
lowest Silurian strata 1866 |
Cambrian formation, 1869 1872 |
I can only recur I can only recur 1859 1860 1861 |
of formations rich in fossils of many kinds, I can recur only 1866 |
I can recur only 1869 1872 |
to the hypothesis given in the
ninth ninth 1859 1860 1861 1866 1869 | tenth 1872 |
chapter. chapter. 1859 1860 1861 1866 1869 |
chapter; namely, that though our continents and oceans have endured for an enormous period in nearly their present relative positions, we have no reason to assume that this has always been the case; consequently formations much older than any now known may lie buried beneath the great oceans. 1872 |
↑1 blocks not present in 1859 1860 1861 1866 1869; present in 1872 | With respect to the lapse of time not having been sufficient since our planet was consolidated for the assumed amount of organic change, and this objection, as urged by Sir William Thompson , is probably one of the gravest as yet advanced, I can only say, firstly, that we do not know at what rate species change as measured by years, and secondly, that many philosophers are not as yet willing to admit that we know enough of the constitution of the universe and of the interior of our globe to speculate with safety on its past duration.
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That the geological record is imperfect all will admit; but that it is imperfect to the degree
which I require, which I require, 1859 1860 1861 1866 |
required by our theory, 1869 1872 |
few will be inclined to admit. If we look to long enough intervals
of time, geology plainly declares that
all species have all species have 1859 1860 1861 1866 |
species have all 1869 1872 |
changed; and they have changed in the manner
which my theory requires, which my theory requires, 1859 1860 1861 1866 |
required, 1869 |
required by the theory, 1872 |
for they have
|
without leaving modified descendants; and the periods, during which species have undergone modification, though long as measured by years, have probably been short in comparison with the periods during which they
..
retained the same form.
It is the dominant and widely It is the dominant and widely 1866 1869 1872 |
Widely 1859 1860 1861 |
ranging species
which vary most frequently and vary which vary most frequently and vary 1866 1869 1872 |
vary 1859 1860 1861 |
most, and varieties are often at first
local— local— 1861 1866 1869 1872 | local,— 1859 1860 |
both causes rendering the discovery of intermediate links
in any one formation less in any one formation less 1866 1869 1872 |
less 1859 1860 1861 |
likely. Local varieties will not spread into other and distant regions until they are considerably modified and
....... 1861 1866 1869 1872 | im- 1859 1860 |
improved; improved; 1861 1866 1869 1872 | proved; 1859 1860 |
and when they
have have 1869 1872 | do 1859 1860 1861 1866 |
spread,
and are and are 1869 1872 | if 1859 1860 1861 1866 |
discovered in a geological formation, they
....... 1872 | will 1859 1860 1861 1866 1869 |
appear as if suddenly created there, and will be simply classed as new species. Most formations have
been been 1859 1860 1866 1869 1872 | been, 1861 |
intermittent in their accumulation; and their
duration duration 1866 1869 1872 | duration, 1859 1860 1861 |
has probably has probably 1866 1869 1872 |
I am inclined to believe, has 1859 1860 1861 |
been shorter than the average duration of specific forms. Successive formations are
in most cases separated in most cases separated 1861 1866 1869 1872 |
separated 1859 1860 |
from each other by
....... 1869 1872 | enormous 1859 1860 1861 1866 |
blank intervals of
time time 1869 1872 | time; 1859 1860 1861 1866 |
of great length; for of great length; for 1869 1872 |
for 1859 1860 1861 1866 |
fossiliferous
formations formations 1861 1866 1869 1872 | formations, 1859 1860 |
thick enough to resist future
degradation degradation 1861 1866 1869 1872 | degradation, 1859 1860 |
can
as a general rule be as a general rule be 1869 1872 |
be 1859 1860 |
generally be 1861 1866 |
accumulated only where much sediment is deposited on the subsiding bed of the sea. During the alternate periods of elevation and of stationary level the record will
generally be generally be 1869 1872 | be 1859 1860 1861 1866 |
blank. blank. 1859 1860 1869 1872 | generally blank. 1861 1866 |
During these latter periods there will probably be more variability in the forms of life; during periods of subsidence, more extinction. |
|
With respect to the absence
of strata rich in fossils of strata rich in fossils 1869 1872 |
of fossiliferous formations 1859 1860 1861 |
OMIT 1866 |
beneath the
Cambrian formation, Cambrian formation, 1869 1872 |
lowest Silurian strata, 1859 1860 1861 |
lowest Silurian strata 1866 |
I can recur only I can recur only 1869 1872 |
I can only recur 1859 1860 1861 |
of formations rich in fossils of many kinds, I can recur only 1866 |
to the hypothesis given in the
tenth tenth 1872 | ninth 1859 1860 1861 1866 1869 |
chapter; namely, that though our continents and oceans have endured for an enormous period in nearly their present relative positions, we have no reason to assume that this has always been the case; consequently formations much older than any now known may lie buried beneath the great oceans. chapter; namely, that though our continents and oceans have endured for an enormous period in nearly their present relative positions, we have no reason to assume that this has always been the case; consequently formations much older than any now known may lie buried beneath the great oceans. 1872 |
chapter. 1859 1860 1861 1866 1869 |
With respect to the lapse of time not having been sufficient since our planet was consolidated for the assumed amount of organic change, and this objection, as urged by Sir William Thompson , is probably one of the gravest as yet advanced, I can only say, firstly, that we do not know at what rate species change as measured by years, and secondly, that many philosophers are not as yet willing to admit that we know enough of the constitution of the universe and of the interior of our globe to speculate with safety on its past duration. That the geological record is imperfect all will admit; but that it is imperfect to the degree
required by our theory, required by our theory, 1869 1872 |
which I require, 1859 1860 1861 1866 |
few will be inclined to admit. If we look to long enough
intervals intervals 1859 1860 1866 1869 1872 | in- tervals 1861 |
of time, geology plainly declares that
species have all species have all 1869 1872 |
all species have 1859 1860 1861 1866 |
changed; and they have changed in the manner
required by the theory, required by the theory, 1872 |
which my theory requires, 1859 1860 1861 1866 |
required, 1869 |
for they have
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