WOEKS OF HEEBEET SPENCEE, 



PUBLISHED BY 



E>. APPLETOIST AND COMPANY. 



SYSTEM OF PHILOSOPHY 



I. FIRST PRINCIPLES. 

 (New and Enlarged Edition.) 

 PART I. THE UNKNOWABLE. 

 PART IL LAWS OF THE KNOWABLE. 



669 pages. Price, $2.50 



IL THE PRINCIPLES OF BIOLOGY. YOL. I. 

 PART I. THE DATA OP BIOLOGY. 

 PART II. THE INDUCTIONS OP BIOLOGY. 

 PART III. THE EVOLUTION OP LIFE. 



475 pages. Price, - $2.60 



PRINCIPLES OF BIOLOGY. VOL. II. 

 PART IY. MORPHOLOGICAL DEVELOPMENT. 

 PART V. PHYSIOLOGICAL DEVELOPMENT. 

 PART VI. LAWS OF MULTIPLICATION. 



565 pages. Price, $2.50 



III. THE PRINCIPLES OF PSYCHOLOGY. 



PART I. THE DATA OP PSYCHOLOGY. 144 pages. Price, - . $0.75 

 PART II. THE INDUCTIONS OP PSYCHOLOGY. 146 pages. Price, - $o!75 

 PART III. GENERAL SYNTHESIS. 100 pages. ) -o . 

 PART IV. SPECIAL SYNTHESIS. 112 pages. [ince, 



MISCELLANEOUS. 



I. ILLUSTRATIONS OF UNIVERSAL PROGRESS. 

 THIRTEEN ARTICLES. 451 pages. Price, ..... $2.50 



IL ESSAYS: 



MORAL, POLITICAL, AND JSaiHETic. 

 TEN ESSAYS. 386 pages. Price, $2.50 



III. SOCIAL STATICS: 

 OR THE CONDITIONS ESSENTIAL TO HUMAN HAPPINESS SPECIFIED, AND THE 



FIRST OP THEM DEVELOPED. 

 623 pages. Price, $2.50 



IV. EDUCATION : 



INTELLECTUAL, MORAL, AND PHYSICAL. 



883 pages. Price, $1.25 



V. CLASSIFICATION OF THE SCIENCES. 

 50 pages. Price, ... ..... $0.25 



VI. SPONTANEOUS GENERATION, Ac. 

 J6 pages Price, . , $0.25 



