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absorption action aeration plate alcohol alumina ammonia appear Bands wide blue bright band bright lines carbon band cells centre chemical chloride coagulation colour continuous spectrum contraction curve Darwin effect electric electromotive force excited experiments F.R.S. Received ferment fibrin fibrinogen flask fluid flutings galvanometer globulin Grains heat hour hydrochloric acid hydrogen hydrogen lines hyomandibula inches increase indicated lecithin length London magnesia magnesium magnetic magnetised bar manganese maximum mean measured metal meteorites method mirror movement muscle nebulae needles nerve nitric acid observed obtained oxide oxidisable oxygen oxyhydrogen flame paper plasma platinum precipitate present pressure produced Professor proteids protoplasm radiation refrangible salt seen silver Society sodium solution species spectra stars stimulation substance sulphate sulphuric acid surface swarm Table teeth temperature tion tooth tube variation ventricles visible Volts wave-lengths wide and dark wire
Page 465 - I soon perceived that selection was the keystone of man's success in making useful races of animals and plants. But how selection could be applied to organisms living in a state of nature remained for some time a mystery to me.
Page 463 - It was evident that such facts as these, as well as many others, could only be explained on the supposition that species gradually become modified ; and the subject haunted me. But it was equally evident that neither the action of the surrounding conditions, nor the will of the organisms (especially in the case of plants) could account for the innumerable cases in which organisms of every kind are beautifully adapted to their habits of life — for instance, a woodpecker or a tree-frog to climb trees,...
Page 463 - In July opened first note-book on Transmutation of Species. Had been greatly struck from about the month of previous March on character of South American fossils, and species on Galapagos Archipelago. These facts (especially latter), origin of all my views...
Page 455 - Nothing could have been worse for the development of my mind than Dr. Butler's school, as it was strictly classical, nothing else being taught, except a little ancient geography and history. The school as a means of education to me was simply a blank.
Page 466 - Favoured Races in the Struggle of Life." It is doubtful if any single book, except the " Principia," ever worked so great and so rapid a revolution in science, or made so deep an impression on the general mind.
Page 454 - ... Nevertheless it is probable that the hearing rather early in life such views maintained and praised may have favoured my upholding them under a different form in my Origin of Species. At this time I admired greatly the Zoonomia; but on reading it a second time after an interval of ten or fifteen years, I was much disappointed; the proportion of speculation being so large to the facts given.
Page 279 - The creature measures above 5J feet from the tip of the nose to the root of the tail, and so approaches in size the smallest Highland cattle.
Page 463 - ... by the South American character of most of the productions of the Galapagos Archipelago, and more especially by the manner in which they differ slightly on each island of the group; none of the islands appearing to be very ancient in a geological sense. "It was evident that such facts as these, as well as many others, could only be explained on the supposition that species become modified; and the subject haunted me.
Page 17 - Virginis, Rigel, etc., are also white stars, but show no lines : perhaps they contain no mineral substance, or are incandescent without flame.