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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.
BY A. WILFORD HALL.
Entered, according to Act of Congress, in the year 1877, by
HALL & CO., in the Office of the Librarian of Congress, at Washington, D.C.
PRINTER 15 Vandewater St., X. Y,
To the' Reader of this book, who may conscientiously desire to arrive at the Truth, and nothing but the Truth, con. cerning the several matters herein discussed, the following pages are affectionately inscribed by