Comparison with 1869 |
|
miraculous interposition. Lamarck seems to have been chiefly led to his conclusion on the gradual change of species, by the difficulty of distinguishing species and varieties, by the almost perfect
graduation graduation 1869 | gradation 1861 1866 1872 |
of forms in certain organic
groups, and by the analogy of domestic productions. With respect to the means of modification, he attributed something to the direct action of the physical conditions of life, something to the crossing of already existing forms, and much to use and disuse, that is, to the effects of habit. To this latter agency he seems to attribute all the beautiful adaptations in nature;—
such
as the long neck of the giraffe for browsing on the branches of trees. But he likewise believed in a law of progressive development; and as all the forms of life thus tended
to progress, in order to account for the existence at the present day of very
simple productions, he maintained
that such forms were
now spontaneously
generated.
∗
|
|
Geoffroy Saint Hilaire, as
is
stated in his 'Life,' written by his son, suspected, as early as 1795, that what we call species are various degenerations of the same type. It was not until 1828 that he published his conviction that the same forms have not been perpetuated since the origin of all things. Geoffroy seems to have relied chiefly on the conditions of life, or the
"
monde
ambiant
," as the cause of change. He was cautious in drawing conclusions, and did not believe that existing species are now undergoing modification; and, as his son adds,
"C'ost "C'ost 1869 | "C'est 1861 1866 1872 |
done done 1861 1869 | donc 1866 1872 |
un problème à réserver entièrement à l'avenir, supposé même que l'avenir doive avoir prise sur lui."
|
|
In 1813
Dr. W. C. Wells read before the Royal Society 'An Account of a White Female, part of whose Skin
resembles that of a Negro;'
but his paper was not published until his famous 'Two Essays upon Dew and Single Vision' appeared in 1818. In this paper he distinctly recognises the principle of natural selection, and this is the first recognition which has been indicated; but he applies it only to the races of man, and to certain characters alone. After
|
miraculous interposition. Lamarck seems to have been chiefly led to his conclusion on the gradual change of species, by the difficulty of distinguishing species and varieties, by the almost perfect
gradation gradation 1861 1866 1872 | graduation 1869 |
of forms in certain
....... 1866 1869 1872 | organic 1861 |
groups, and by the analogy of domestic productions. With respect to the means of modification, he attributed something to the direct action of the physical conditions of life, something to the crossing of already existing forms, and much to use and disuse, that is, to the effects of habit. To this latter agency he seems to attribute all the beautiful adaptations in
nature;—such nature;—such 1866 1869 | nature;— 1861 1872 |
....... 1866 1869 | such 1861 1872 |
as the long neck of the giraffe for browsing on the branches of trees. But he likewise believed in a law of progressive development; and as all the forms of life thus
tend tend 1866 1869 1872 | tended 1861 |
to progress, in order to account for the existence at the present day of
....... 1866 1869 1872 | very 1861 |
simple productions, he
maintains maintains 1866 1869 1872 | maintained 1861 |
that such forms
are are 1866 1869 1872 | were 1861 |
now spontaneously
generated.
∗
|
|
Geoffroy
Saint Hilaire, as Saint Hilaire, as 1861 1866 1869 |
Saint-Hilaire, 1872 |
is is 1861 1866 1869 | as is 1872 |
stated in his 'Life,' written by his son, suspected, as early as 1795, that what we call species are various degenerations of the same type. It was not until 1828 that he published his conviction that the same forms have not been perpetuated since the origin of all things. Geoffroy seems to have relied chiefly on the conditions of life, or the
"
monde
ambiant,
"
ambiant,
"
1866 1869 |
ambiant
,"
1861 |
ambiant
"
1872 |
as the cause of change. He was cautious in drawing conclusions, and did not believe that existing species are now undergoing modification; and, as his son adds,
"C'est "C'est 1861 1866 1872 | "C'ost 1869 |
donc donc 1866 1872 | done 1861 1869 |
un problème à réserver entièrement à l'avenir, supposé même que l'avenir doive avoir prise sur
lui." lui." 1861 1866 1869 |
lui." — — — — — — — — — — — — — — — — 1872 |
|
|
In
1813
Dr. W. C. Wells read before the Royal Society 'An Account of a White Female, part of whose
Skin
resembles that of a
Negro;' Negro;' 1866 1869 | Negro'; 1872 |
but his paper was not published until his famous 'Two Essays upon Dew and Single Vision' appeared in 1818. In this paper he distinctly recognises the principle of natural selection, and this is the first recognition which has been indicated; but he applies it only to the races of man, and to certain characters alone. After
|