WOEKS OF HEEBEET SPENCEE, 



PUBLISHED BY 



D. APiPLETOISr AND COMPANY. 



SYSTEM OF PHILOSOPHY 



I. FIKST PRINCIPLES. 

 (New and Enlarged Edition.) 

 PART I. THE UNKNOWABLE. 

 PART II. LAWS OP THE KNOWABLE. 



659 pages. Price, $2.50 



II. THE PRINCIPLES OF BIOLOGY. VOL. I. 

 PART I. THE DATA OP BIOLOGY. 

 PART II. THE INDUCTIONS OP BIOLOGY. 

 PART III. THE EVOLUTION OP LIFE. 



475 pages. Price, $2.50 



PRINCIPLES OF BIOLOGY. VOL. II. 

 PART IV. MORPHOLOGICAL DEVELOPMENT. 

 PART V. PHYSIOLOGICAL DEVELOPMENT. 

 PART VI. LAWS OP MULTIPLICATION. 



665 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, - $0^75 

 PART III. GENERAL SYNTHESIS. 100 pages. ) T, . 

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



MISCELLANEOUS. 



I. ILLUSTRATIONS OF UNIVERSAL PROGRESS. 

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



II. ESSAYS : 



MORAL, POLITICAL, AND .^ESTHETIC. 

 TEN ESSAYS. S86 pages. Price, $2.50 



III. SOCIAL STATICS: 

 OR THE CONDITIONS ESSENTIAL TO HUMAN HAPPINESS SPECIFIED, AND THE 



FIRST OP THEM DEVELOPED. 

 fr23 pages. Price, - .-.:.. $2.50 



IV. EDUCATION : 



INTELLECTUAL, MORAL, AND PHYSICAL. 



283 pages. Price, $1.25 



V. CLASSIFICATION OF THE SCIENCES. 

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



VI. SPONTANEOUS GENERATION, &c. 

 ?6 pages Price, , $0.25 



