SPENCER'S SYNTHETIC PHILOSOPHY, 



J2mo, cloth, $2,00 per volume. 

 NEW EDITION OF 



First Principles. 



By HERBERT SPENCER. New and revised (sixth) edition of the 

 first volume of the author's Synthetic Philosophy. 



This fundamental and most important work has been changed in 

 substance and in form to a considerable extent, and largely rewritten 

 and wholly reset. It is now forty years since the author began the 

 " First Principles," and its presentation in this definitive form, with 

 the author's last revisions, is an event of peculiar interest and conse- 

 quence. While experience has not caused him to recede from the gen- 

 eral principles set forth, he has made some important changes in the sub- 

 stance and form. His amendments of matter and manner are now final. 



The contents of the several volumes of the series are as follows: 



1. First Principles. I. The Unknowable. II. The Knowable. 



2. The Principles of Biology. Vol. i. I. The Data of Biology. 



II. The Inductions of Biology. III. The Evolution of Life. 



3. The Principles of Biology. Vol. 2. IV. Morphological Devel- 



opment. V. Physiological Development. VI. Laws of Mul- 

 tiplication. 



4. The Principles of Psychology. Vol. i. I. The Data of 



Psychology. II. The Inductions of Psychology. III. General 

 Synthesis. IV. Special Synthesis. V. Physical Synthesis. 



5. The Principles of Psychology. Vol. 2. VI. Special Analysis. 



VII. General Analysis. VIII. Congruities. IX. Corollaries. 



6. The Principles of Sociology. Vol. i. I. The Data of Soci- 



ology. II. The Inductions of Sociology. III. The Domestic 

 Relations. 



7. The Principles of Sociology. Vol. 2. IV. Ceremonial Insti- 



tutions. V. Political Institutions. 



8. The Principles of Sociology. Vol. 3. VI. Ecclesiastical In- 



stitutions. VII. Professional Institutions. VIII. Industrial 

 Institutions. 



9. The Principles of Ethics. Vol. i. I. The Data of Ethics. 



II. The Inductions of Ethics. III. The Ethics of Individual 

 Life. 



10. The Principles of Ethics. Vol. 2. IV. The Ethics of Social 

 Life : Justice. V The Ethics of Social Life : Negative Benefi- 

 cence. VI. The Ethics of Social Life : Positive Beneficence. 



D. APPLE TON AND COMPANY, NEW YORK, 



