...Haeckel, published by the latter in his " History of Creation" (Natiirlichen Schopfungsgeschichte). " Having reflected much on the foregoing facts, it seemed...from a common progenitor to diverge in character."* That organisms are variable and not fixed in rigid forms, is a phenomenon so general that variability...

...Haeckel, published by the latter in his " History of Creation " (Natiirlichen Schopfungsgeschichte). "Having reflected much on the foregoing facts, it...from a common progenitor to diverge in character."* That organisms are variable and not fixed in rigid forms, is a phenomenon so general that variability...

...geological observations had allowed me to appreciate to a certain extent the duration of past geologicaj periods. With my mind thus prepared I fortunately...from a common progenitor to diverge in character."* That organisms are variable and not fixed in rigid forms, is a phenomenon so general that variability...

...therefore to study domesticated animals and cultivated plants, and after a time perceived that man-s power of selecting and breeding from certain individuals...descendants from a common progenitor to diverge in character.2 In 1858 Mr. Wallace, who was studying the Natural History of the Malay Archipelago, sent...

...attended to the habits of animals and their relations to the surrounding conditions, I was able to realise the severe struggle for existence to which all organisms...from a common progenitor to diverge in character.' It is impossible, indeed, to overrate the importance of Malthus, viewed as a schoolmaster to bring...

...the habits of animals and their relations to the surrounding conditions, I was able to realise the struggle for existence to which all organisms are...from a common progenitor to diverge in character." With reference to Darwin's critics and detractors referred to by Professor Huxley, there is a good...

...geological periods. With my mind thus prepared I fortunately happened to read Malthus's " Essay 011 Population ; " and the idea of natural selection through...from a common progenitor to diverge in character.' It is impossible, indeed, to overrate the importance of Malthus, viewed as a schoolmaster to bring...

...during several years I could not conceive how each form could have been modified so as to become so admirably adapted to its place in nature. I began,...from a common progenitor, to diverge in character." Darwin does not tell us at what period of his mental development he read Malthus. We know the date...

...to the habits of animals, and their relations to the surrounding conditions, I was able to realise the severe struggle for existence to which all organisms...from a common progenitor to diverge in character." * Malthus taught the inevitable tendency of all animal life to increase beyond the means of subsistence,...

...appreciate the duration of past geological periods. With my mind thus prepared, I fortunately happened upon Malthus's 'Essay on Population,' and the idea of natural...the struggle for existence at once occurred to me." So it remained for the astute mind of De Vries to perceive that sudden changes of structure were possible,...