Fifty Years of Darwinism: Modern Aspects of Evolution; Centennial Addresses in Honor of Charles Darwin, Before the American Association for the Advancement of Science, Baltimore, Friday, January 1, 1909
H. Holt, 1909 - 274 стор.
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acquired acters action adaptive American animals appear arise Asa Gray become body called causes cave cells certain changes char Characins closely color conclusion continuous crossed Darwin definite derived determined direction discontinuous doubt effects eggs elements eliminated entire environment evidence evolution example existence experiments explanation expressed fact factors field finally fishes force four give gray hereditary heredity horns hypothesis important independently individual influence instance interesting isolation kinds known least less Letters lines living material matter ment minute modification mutation namely Natural Selection observation ontogeny organs origin paleontology parent pigment plants possible present principle probably processes produced proportion question reason regarded relation seems shown similar single species stage structure successive teeth theory tion transmission true unit characters variations varieties various whole yellow
Сторінка 14 - but no. From scarped cliff and quarried stone She cries " A thousand types are gone : I care for nothing, all shall go.
Сторінка 207 - These laws, taken in the largest sense being Growth with Reproduction; Inheritance which is almost implied by reproduction; Variability from the indirect and direct action of the conditions of life and from use and disuse; a Ratio of Increase so high as to lead to a struggle for Life, and as a consequence to Natural Selection, entailing Divergence of Character and the Extinction of less-improved forms. Thus from the war of nature, from famine and death, the most exalted object which we are capable...
Сторінка 73 - Given any species in any region, the nearest related species is not likely to be found in the same region nor in a remote region, but in a neighboring district separated from the first by a barrier of some sort, or at least by a belt of country, the breadth of which gives the effect of a barrier.
Сторінка 11 - All which seem to have been gradually produced during many generations by the perpetual endeavour of the creatures to supply the want of food, and to have been delivered to their posterity with constant improvement of them for the purposes required.
Сторінка 13 - I can without saying so in so many words —for I have always thought that the great merit of the Principles was that it altered the whole tone of one's mind...
Сторінка 12 - For consistent uniformitarianism postulates evolution as much in the organic as in the inorganic world. The origin of a new species by other than ordinary agencies would be a vastly greater " catastrophe " than any of those which Lyell successfully eliminated from sober geological speculation.
Сторінка 16 - It was, very briefly, that there had been no gradual modification of the surface of the earth, or slow development of organic forms, but that when the catastrophic act of creation took place, the world presented, instantly, the structural appearance of a planet on which life had long existed.
Сторінка 22 - I have read your book with more pain than pleasure. Parts of it I admired greatly, parts I laughed at till my sides were almost sore ; other parts I read with absolute sorrow, because I think them utterly false and grievously mischievous. You have deserted — after a start in that tram-road of all solid physical truth — the true method of induction, and started us in machinery as wild, I think, as Bishop Wilkins's locomotive that was to sail with us to the moon.
Сторінка 20 - I was then (as often since) the "young man in a hurry"; he, the painstaking and patient student, seeking ever the full demonstration of the truth that he had discovered, rather than to achieve immediate personal fame. Such being the actual facts of the case, I should have had no cause for complaint if the respective shares of Darwin and myself in regard to the elucidation of nature's method of organic development had been thenceforth estimated as being, roughly, proportional to the time we had each...