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From The Riddle of the Universe at the Close of the Nineteenth Century by Ernst Haeckel.

JOSEPH McCABE

[Illustration]

HARPER & BROTHERS PUBLISHERS NEW YORK AND LONDON 1905

Copyright, 1900, by HARPER & BROTHERS.

_All rights reserved._

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TRANSLATED BY: The Riddle of the Universe at the Close of the Nineteenth Century by Ernst Haeckel | amphi