WOEKS OF HEEBEET SPENCER, 



PUBLISHED BY 



D A.PPLETON AND COMPANY 



SYSTEM OF PHILOSOPHY 



I.— FIRST PRINCIPLES. 



{A r ew and Enlarged Edition.) 



Vivt I, — The Unknowable. 



Pir\ i I.— Laws of the Knowable. 



559 pages. Price, .-.--- f 2 50 



II.— THE PRINCIPLES OF BIOLOGY.— VOL. I. 



Pjri I. — The Data of Biology. 

 Part [I. — The Inductions of Biology. 

 Part ill. — The Evolution of Life. 



175 pages. Price, |2.60 



PRINCIPLES OF BIOLOGY.— VOL. II. 



Part IV. — Morphological Development. 

 Pari V. — Physiological Development. 

 Pari VI. — Laws of Multiplication. 



565 pages. Price, $2.50 



III.— THE PRINCIPLES OF PSYCHOLOGY. 



Pari I. — The Data of Psychology. 144 pages. Price, - - $0.75 



Part II. — The Inductions of Psychology. 146 pages. Price, - $0.75 



Part III. — General Synthesis. 100 pages. ) p . .. 



Part IV.— Special Synthesis. 112 pages. f-trice, - - *>1.UU 



MISCELLANEOUS. ./ 



I.— ILLUSTRATIONS OF UNIVERSAL PROGRESS. 

 Thirteen Articles. 451 pages. Price, ..... $2.50 



II.— ESSAYS : 



Moral, Political, and ^Esthetic. 



Tsn Essays. 386 pages. Price, ... - $2.50 



III.— SOCIAL STATICS: 



Or the Conditions Essential to Human Happiness Specified, aid the 



First of them Developed. 

 *SS pages. Price, ■' - $2.B( 



IV.— EDUCATION : 



Intei lectual, Moral, and Physical. 



183 pages. Price, ' - $L25 



V.— CLASSIFICATION OF THE SCIENCES. 

 »0 pages. Price, ... - .... $0.26 



VI.— SPONTANEOUS GENERATION, &c 

 t6 pages Price, §0.28 



