Works of Herbert Spencer published by D. Appleton & Co, 
The Philosophy of Herbert Spencer. 
THE 
PRINCIPLES OF BIOLOGY 
Vol. I. 475 pages. (Now in press.) 
CONTENTS: 
Part I.—Tnx Data or Bioioey. 
I, Organic Matter.—II. The actions of Forces on Organic Matter.—III. The 
ve-actions of Organic Matter on Forces.—IV. Proximate Definition of 
Life.—V. The Correspondence between Life and its Cireumstances.— 
VI. The Degree of Life varies asthe Degree of Correspondence.— 
VII. The Scope of Biology. 
Parr I].—Tner Inpcctions or Broxoey. 
I. Growth.—II. Development.—II. 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. 
Pant IJ.—Tue Evo.vrion or Lnm, 
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, 
—VIUI. How is Organic Evolution caused ?—IX. External Factors.— 
X. Internal Factors.—XI. Direct Equilibration.—XII. Indirect Equili 
bration.—XII. The Codperation 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 
chem in departments in which our common Educational system is very deficient. The 
activo citizen may derive from them accurate systematized information concerning his 
highest duties to society, and the principles on which they are based. He may gain 
clearer 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 
—nsy, we will venture to say of truer emotion—than before. By giving us fuller reali- 
cations of Hberty and justice his writings will tend to increase our self-reliance in the 
great emergency of civilization to which we have been summoned.— Atlantic Monthlv 
