WOEKS OF HEEBEET SPENCEE, 



PUBLISHED BY 



E>. APPLETON AND COMPANY. 



SYSTEM OF PHILOSOPHY 



I.— FIRST PRINCIPLES. 



(New and Enlarged Edition.) 

 Pakt I. — The Unknowable. 

 Part II.— Laws op the Knowable. 



659 pages. Price, ........ $2.80 



II.— THE PRINCIPLES OF BIOLOGY.— YOL. L 

 Part I. — The Data of Biology. 

 Part II. — The Inductions op Biology. 

 Part III. — The Evolution of Life. 



475 pages. Price, ........ $2.60 



PRINCIPLES OF BIOLOGY.— YOL. 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 of Psychology. 141 pages. Price, . . $0.75 



Part II. — TnE Inductions of Psychology. 146 pages. Price - $0.16 

 Part HI. — General Synthesis. 100 pages. ) „ . 



Part IY.— Special Synthesis. 112 pages. price, - - $1.00 



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 



HI.— SOCIAL STATICS: 



Or TnE Conditions Essential to Human Happiness Specified, and the 



First of them Developed. 



6-23 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, Ac. 

 i6 pages Price, . , $0.2B 



