Page - 13 - in The Origin of Species
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HISTORICAL SKETCH 13
The celebrated geologist and naturalist, Von Buch', in his
excellent 'Description Physique des Isles Canaries' (1836,
p. 147), clearly expresses his belief that varieties slowly be-
come changed into permanent species, which arc no longer
capable of intercrossing.
Rafinesque, in his 'New Flora of North America,' pub-
lished in 1836, wrote (p. 6) as follows :— " All species might
have been varieties once, and many varieties are gradually
becoming species by assuming constant and peculiar charac-
ters;" but farther on (p. 18) he adds, "except the original
types or ancestors of the genus."
In 1843-44 Professor Haldeman (' Boston Journal of Nat.
Hist. U. States,' vol. iv. p. 468) has ably given the arguments
for and against the hypothesis of the development and modi-
fication of species : he seems to lean towards the side of
change.
The 'Vestiges of Creation' appeared in 1844. In the tenth
and much improved edition (1853) the anonymous author
says (p. 155) :— "The proposition determined on after much
consideration is, that the several series of animated beings,
from the simplest and oldest up to the highest and most re-
cent, are, under the providence of God, the results, first, of an
impulse which has been imparted to the forms of life, ad-
vancing them, in definite times, by generation, through grades
of organisation terminating in the highest dicotyledons and
vertebrata, these grades being few in number, and generally
marked by intervals of organic character, which we find to
be a practical difficulty in ascertaining affinities
; second, of
another impulse connected with the vital forces, tending, in
the course of generations, to modify organic structures in
accordance with external circumstances, as food, the nature
of the habitat, and the meteoric agencies, these being the
'
adaptations ' of the natural theologian." The author ap-
parently believes that organisation progresses by sudden
leaps, but that the effects produced by the conditions of life
are gradual. He argues with much force on general grounds
that species are not immutable productions. But I cannot see
how the two supposed "
impulses "
account in a scientific
sense for the numerous and beautiful co-adaptations which
we see throughout nature; I cannot see that we thus gain
back to the
book The Origin of Species"
The Origin of Species
- Title
- The Origin of Species
- Author
- Charles Darwin
- Publisher
- P. F. Collier & Son
- Location
- New York
- Date
- 1909
- Language
- English
- License
- PD
- Size
- 10.5 x 16.4 cm
- Pages
- 568
- Keywords
- Evolutionstheorie, Evolution, Theory of Evolution, Naturwissenschaft, Natural Sciences
- Categories
- International
- Naturwissenschaften Biologie
Table of contents
- EDITOR'S INTRODUCTION 5
- AN HISTORICAL SKETCH of the Progress of Opinion on the Origin of Species 9
- INTRODUCTION 21
- Variation under Domestication 25
- Variation under Nature 58
- Struggle for Existence 76
- Natural Selection; or the Survival of the Fittest 93
- Laws of Variation 145
- Difficulties of the Theory 178
- Miscellaneous Objections to the Theory of Natural Selection 219
- Instinct 262
- Hybridism 298
- On the Imperfection of the Geological Record 333
- On the Geological Succession of Organic Beinss 364
- Geographical Distribution 395
- Geographical Distribution - continued 427
- Mutual Affinities of Organic Beings: Morphology: Embryology: Rudimentary Organs 450
- Recapitulation and Conclusion 499
- GLOSSARY 531
- INDEX 541