THE PRINCIPLES

OF

BIOLOGY.

BY

66

HERBERT SPENCER,

AUTHOR OF SOCIAL STATICS," THE PRINCIPLES OF PSYCHOLOGY,"

ESSAYS: SCIENTIFIC, POLITICAL, AND SPECULATIVE,"

66 FIRST PRINCIPLES," ETC.

VOL. I.

OD/

BIB

WILLIAMS AND NORGATE,

14, HENRIETTA STREET, COVENT GARDEN, LONDON;
AND 20, SOUTH FREDERICK STREET, EDINBURGH.