Darwiniana: Essays and Reviews Pertaining to DarwinismD. Appleton, 1877 - 396 páginas |
Dentro del libro
Resultados 1-5 de 49
Página vii
... prove Transmutation . - Known Extent of Variation . - Cause of Likeness unknown , -Artificial Selection . - Reversion . - In- terbreeding . - Natural Selection . - Classification tentative.- What Darwin assumes . - Argument stated ...
... prove Transmutation . - Known Extent of Variation . - Cause of Likeness unknown , -Artificial Selection . - Reversion . - In- terbreeding . - Natural Selection . - Classification tentative.- What Darwin assumes . - Argument stated ...
Página 13
... prove that the species we recognize have not been in- dependently created , as such , but have descended , liko varieties , from other species . Varieties , on this view , are incipient or possible species : species are varieties of a ...
... prove that the species we recognize have not been in- dependently created , as such , but have descended , liko varieties , from other species . Varieties , on this view , are incipient or possible species : species are varieties of a ...
Página 14
... proved only indirectly , by the failure of every attempt to refer the phenomena in question to causal laws . But , however originated , and whatever bo thought of Mr. Darwin's arduous undertaking in this respect , it is certain that ...
... proved only indirectly , by the failure of every attempt to refer the phenomena in question to causal laws . But , however originated , and whatever bo thought of Mr. Darwin's arduous undertaking in this respect , it is certain that ...
Página 20
... proved true ( p . 449 ) ; and p . 338 ; Agarsiz insists that ancient animals resemble to a certain extent the embryos of recent animals of the same classes ; or that the geological succession of ex . tinct forms is in some degree ...
... proved true ( p . 449 ) ; and p . 338 ; Agarsiz insists that ancient animals resemble to a certain extent the embryos of recent animals of the same classes ; or that the geological succession of ex . tinct forms is in some degree ...
Página 24
... first , for , as he does assign real causes , lie is bound to prove their adequacy . It should be kept in mind that , while all direct proof of independent origination is attainable from the nature of 21 DARWINIANA .
... first , for , as he does assign real causes , lie is bound to prove their adequacy . It should be kept in mind that , while all direct proof of independent origination is attainable from the nature of 21 DARWINIANA .
Otras ediciones - Ver todas
Términos y frases comunes
actual adaptation Agassiz American appears argument atheistic Atlantic United auroch bald cypress balls botanists California Candolle common conclusion connection creation Creator Cretaceous crystalline lens Darwin Darwin's theory derivative hypothesis descendants direct distinct doctrine equally Europe evidence evolution explain extinct facts favor final causes flora force forms fossil genera genus geographical geological glands Glyptostrobus gradations ground havo human idea individuals infer insects instance Japan laws least less living matter means ment mind miocene Natural History natural selection natural theology naturalists nebular hypothesis North object origin of species particular peculiar perhaps period philosophical phyllotaxis physical plants and animals present probably produced proof prove question races redwoods regard region remarks reviewer samo Sarracenia scientific Sequoia somo sort succession sundew supernatural suppose Taxodium tentacles tertiary theistic theology theso things thought tion tive trees varieties vary vegetable whole
Pasajes populares
Página 133 - And God said, Let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth after his kind: and it was so.
Página 147 - To my mind it accords better with what we know of the laws impressed on matter by the Creator, that the production and extinction of the past and present inhabitants of the world should have been due to secondary causes, like those determining the birth and death of the individual.
Página 233 - England and some other parts of Europe. So the Sequoias, now remarkable for their restricted station and numbers, as well as for their extraordinary size, are of an ancient stock ; their ancestors and kindred formed a large part of the forests which flourished throughout the polar regions, now desolate and iceclad, and which extended into low latitudes in Europe.
Página 273 - But the only distinct meaning of that word is stated, fixed, or settled; since what is natural, as much requires and presupposes an intelligent agent to render it so, ie to effect it continually or at stated times, as what is supernatural or miraculous does to effect it for once. And from hence it must follow, that persons...
Página 29 - Altogether at least a score of pigeons might be chosen, which, if shown to an ornithologist, and he were told that they were wild birds, would certainly be ranked by him as well-defined species.
Página 178 - Hilaire, that is, against the supposition that time brings about a gradual alteration of whole species ; but it goes for little against Darwin, unless it be proved that species never vary, or that the perpetuation of a variety necessitates the extinction of the parent breed. For Darwin clearly maintains— what the facts warrant— that the mass of a species remains fixed so long as it exists at all, though it may set off a variety now and then. The variety may finally supersede the parent form...
Página 297 - ... part, without sensible effects. The little prisoner is not crushed and suddenly destroyed, as is sometimes supposed, for I have often liberated captive flies and spiders, which sped away as fast as fear or joy could hasten them. At other times I have found them enveloped in a fluid of mucilaginous consistence, which seems to act as a solvent, the insects being more or less consumed in it.
Página 15 - ... either hand, and say how much of truth there may be in each? The present reviewer has not the presumption to undertake such a task. Having no prepossession in favor of naturalistic theories, but struck with the eminent ability of Mr. Darwin's work, and charmed with its fairness, our humbler duty will be performed if, laying aside prejudice as much as we can, we shall succeed in giving a fair account of its method and argument, offering by the way a few suggestions, such as might occur to any...
Página 31 - If strange and rare deviations of structure are really inherited, less strange and commoner deviations may be freely admitted to be inheritable. Perhaps the correct way of viewing the whole subject would be, to look at the inheritance of every character whatever as the rule, and non-inheritance as the anomaly.