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AN ADDRESS DELIVERED BY JOHN WESLEY POWELL BEFORE THE BIOLOGICAL SOCIETY OF WASHINGTON AT THE DARWIN MEMORIAL MEETING MAY 12 1882 WASHINGTON JUDD & DETWEILER, PRINTERS 1882 THE THREE METHODS OF EVOLUTION BY JOHN WESLEY POWELL PRESIDENTIAL ADDRESS DELIVERED BEFORE THE PHILOSOPHICAL SOCIETY OF WASHINGTON DECEMBER 8 1883 FROM THE BULLETIN OF THE SOCIETY VOL. VI WASHINGTON PRINTED BY JUDD & DETWEILER 1883 |