Contributions to the Theory of Natural Selection: A Series of Essays |
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Page 2
... not once merely , but perhaps hundreds , perhaps thousands of times : — That
all these operations have been more or less continuous , but unequal in their
progress , and during the whole series the organic life of the earth has
undergone a ...
... not once merely , but perhaps hundreds , perhaps thousands of times : — That
all these operations have been more or less continuous , but unequal in their
progress , and during the whole series the organic life of the earth has
undergone a ...
Page 3
cent formations , while other species continually die out and disappear , so that
the present condition of the organic world is clearly derived by a natural process
of gradual extinction and creation of species from that of the latest geological ...
cent formations , while other species continually die out and disappear , so that
the present condition of the organic world is clearly derived by a natural process
of gradual extinction and creation of species from that of the latest geological ...
Page 4
The following propositions in Organic Geography and Geology give the main
facts on which the hypothesis is founded . Geography . 1 . Large groups , such as
classes and orders , are generally spread over the whole earth , while smaller ...
The following propositions in Organic Geography and Geology give the main
facts on which the hypothesis is founded . Geography . 1 . Large groups , such as
classes and orders , are generally spread over the whole earth , while smaller ...
Page 5
The distribution of the organic world in time is very similar to its present
distribution in space . 6 . Most of the larger and some small groups extend
through several geological periods . 7 . In each period , however , there are
peculiar groups ...
The distribution of the organic world in time is very similar to its present
distribution in space . 6 . Most of the larger and some small groups extend
through several geological periods . 7 . In each period , however , there are
peculiar groups ...
Page 6
Now , all attempts at a Natural classification and arrangement of organic beings
show , that both these plans have 6 ON THE LAW WHICH HAS REGULATED
form of a true system of Classification determined by this Law-Geo-
Now , all attempts at a Natural classification and arrangement of organic beings
show , that both these plans have 6 ON THE LAW WHICH HAS REGULATED
form of a true system of Classification determined by this Law-Geo-
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abundant action adapted allied animals appear beautiful become believe birds body build butterflies causes Celebes changes character closely colour common comparatively complete concealment consider conspicuous continually direct distinct doubt Edition equally evidence exactly example existence explained facts female flight flowers frequently further genera genus give greater groups habits imitation important increase India individuals inhabiting insects interesting islands Java kind known less limited living male marked materials means mimicry modifications moths natural selection necessary nest never objects observations occur organic original Papilio perfect period phenomena possess present probably produced protection race reason region remarkable render resemble result savage seems seen sexes shown similar species structure supposed tail theory tints tion trees tropical true universe variation varied varieties various whole wings
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Bibliographic information
| Title | Contributions to the Theory of Natural Selection: A Series of Essays Contributions to the Theory of Natural Selection: A Series of Essays, Alfred Russel Wallace Marilee E. Thomas and Robert C. Thomas Science and Related Subjects Collection |
| Author | Alfred Russel Wallace |
| Edition | 2 |
| Publisher | Macmillan and Company, 1870 |
| Original from | Oxford University |
| Digitized | 8 mai 2006 |
| Length | 384 pages |
| Export Citation | BiBTeX EndNote RefMan |