CA SYSTEM

OF

SYNTHETIC PHILOSOPHY.

VOL. IX.7

HERBERT SPENCER'S WORKS.

Synthetic Philosophy:

FIRST PRINCIPLES.

I vol., 12mo.

$2.00.

THE PRINCIPLES OF BIOLOGY. 2 vols., 12mo. $4.00.
THE PRINCIPLES OF PSYCHOLOGY. 2 vols., 12mo. $4.00.
THE PRINCIPLES OF SOCIOLOGY. 2 vols., 12mo. $4.00.
THE PRINCIPLES OF ETHICS. 2 vols., 12mo. $4.00.

Essays: Scientific, Political, and Speculative. New edition. 3 vols., 12mo. $6.00.

Social Statics, Abridged and Revised; and THE MAN versus THE STATE. I vol., 12mo. $2.00.

The Study of Sociology. 1 vol., 12mo. $1.50.

Education. I vol., 12mo. Paper, 50 cents; cloth, $1.25. The Inadequacy of "Natural Selection." 12mo. Paper, 30 cents.

Descriptive Sociology.

8 vols., folio. $35.00.

A Cyclopædia of Social Facts.

D. APPLETON & CO., Publishers, New York.

THE PRINCIPLES

OF

ETHICS.

BY

HERBERT, SPENCER.

VOL. L.

NEW YORK:

D. APPLETON AND COMPANY.

1893.