Page:Popular Science Monthly Volume 10.djvu/59

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PROFESSOR HUXLEY'S LECTURES.
49

mony to an eternity of duration, you must have an eternity of witnesses or an infinity of circumstances, and neither of these is attainable. It is utterly impossible that such evidence should be carried beyond a certain point of time, and all that could be said at most should be that there was nothing to contradict the hypothesis. But when you look, not to the testimonial evidence—which might not be good for much in this case—but to the circumstantial evidence, then you find that this hypothesis is absolutely incompatible with that circumstantial evidence, and the evidence is of so plain and so simple a character that it is impossible in any way to escape from the conclusions which it forces upon us.

IDEAL SECTION OF THE CRUST OF THE EARTH.