Work* <tf Herbert Spencer published by D. AppUtcn & Co. 

 Tiie Fhilosopliy of Herbert Spencer. 



THE 



PRINCIPLES OF BIOLOGY 



Vol. I. 475 pages. (Now in press.) 



CONTENTS: 

 PART I. THE DATA OP BIOLOGY. 



L Organic Matter. II. The actions of Forces on Organic Matter. III. The 

 re-actions of Organic Matter on Forces. IV. Proximate Definition of 

 Life. V. The Correspondence between Life and its Circumstances. 



VI. The Degree of Life varies as the Degree of Correspondence. 



VII. The Scope of Biology. 



PART II. THE INDUCTIONS OF BIOLOGY. 



L Growth. II. Development. III. Function. IV. Waste and Repair. 

 V. Adaptation. VI. Individuality. VII. Genesis. VIII. Heredity. 



IX. Variation. X. Genesis, Heredity, and Variation. XI. Classifica- 

 tion. XII. Distribution. 



PART III. THE EVOLUTION OP Luna. 



I. Preliminary. II. General Aspects of the Special-creation-hypothesis. 

 III. General Aspects of the Evolution-hypothesis. IV. The Arguments 

 from Classification. V. The Arguments from Embryology. VI. The 

 Arguments from Morphology. VII. The Arguments from Distribution. 

 VIII. How is Organic Evolution caused ? IX. External Factors. 



X. Internal Factors. XI. Direct Equilibration. XII. Indirect Equili 

 bration. XIII. The Cooperation of the Factors. XIV. The Converg 

 ence of the Evidences. 



All these works are rich In materials for forming intelligent opinions, even where 

 we are unable to agree with those put forth by the author. Much may be learned from 

 Jhcm in departments in which our common Educational system is very deficient. The 

 active citizen may derive from them accurate systematized information concerning hia 

 highest duties to society, and the principles on which they arc based. He may gaio 

 dearer notions of the value and bearing of evidence, and be better able to distinguish 

 between facts and inferences. He may find common things suggestive of wiser thought 

 nay, we will venture to say of truer emotion than before. By giving us fuller rcali- 

 tations of liberty and justice his vritings will tend to increase onr self-reliance in the 

 ireat emergency of civilization to which we have been summoned Atlantic Monthly 



