When we come to consider specific characters, we see that a difference exists—that, in short, the species and even genera are no longer represented upon earth. More than this, it will be found that the earliest species comparatively soon gave place to others, and that they are not represented even in the next higher group of rocks.
Scottish publisher and writer (1802–1871)
Robert Chambers (10 July 1802 – 17 March 1871) was a Scottish publisher, author, journal editor, geologist and evolutionary thinker.
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Now as there are, according to Humboldt, one hundred and seventy words in common between the languages of the new and old continents, and many of these are expressive of the most primitive ideas, there is, by Dr Young's calculation, overpowering proof of the original connection of the American and other human families.
The rise of each generation gives new ties towards the future, which insensibly dissolves those which bind us to the past; and the natural old age of the human race seems to have adjusted itself to that period beyond which the human being would feel isolated and desolate in the midst of the new objects of attachment which the progress of time brings into existence.
The working-classes require leaders and wise heads from their own body—patriarchs, in the old acceptation of the term—to keep them right in moments of excitement. The causes of early death prevent the existence of such a class of men, sobered and wise from experience, in sufficient numbers to discipline the youthful and fiery spirits who, confident in their ignorance, plunge themselves and those depending on their exertions into ruin.
The progress of knowledge is very irregular, somewhat resembling the movements of an army, of which some battalions are in vigorous health, while others are sickly or overburdened with baggage. The experimental marches on at a good pace; the observational proceeds but slowly; the speculative is left far in the rear.
The historical era is, we know, only a small portion of the entire age of our globe. We do not know what may have happened during the ages which preceded its commencement, as we do not know what may happen in ages yet in the distant future. All, therefore, that we can properly infer from the apparently invariable production of like by like is, that such is the ordinary procedure of nature in the time immediately passing before our eyes.
The appearance... of limestone beds in the early part of the stratified series, may be presumed to be connected with the fact of the commencement of organic life upon our planet, and, indeed, a consequent and a symptom of it. ...My hypothesis may indeed be unsound; but, whether or not, it is clear, taking organic remains as upon the whole a faithful chronicle, that the deposition of these limestone beds was coeval with the existence of the earliest, or all but the earliest, living creatures upon earth.