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PROBLEM OF HUMAN LIFE:
.“ EVOLUTION OF SOUND” AND “EVOLUTION EVOLVED,”
A REVIEW OF THE SIX GREAT MODERN SCIENTISTS,
DARWIN, HUXLEY, TYNDALL, HAECKEL,
HELMHOLTZ, AND MAYER.
To the Reader of this book, who may conscientiously desire to arrive at the Truth, and nothing but the Truth, concerning the several 'matters herein discussed, the following
pages are affectionately inscribed by