FIRST PRINCIPLES.

"ILLUSTRATIONS OF UNIVERSAL PROGRESS," "ESSAYS, MORAL, POLITICAL AND ESTHETIQ,'
66 PRINCIPLES OF PSYCHOLOGY," "PRINCIPLES OF BIOLOGY," "SOCIAL STATIOS,"
"EDUCATION," ETC., ETO.

SECOND EDITION.

NEW YORK:

D. APPLETON AND COMPANY,

90, 92 & 94 GRAND STREET.

1870.