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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.-THE DATA OF BIOLOGY.

I. 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,

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I. Growth.-II. Development.-III. Function.--IV. Waste and Repair.

V. Adaptation.-VI. Individuality.VII. Genesis.-VIII. HeredityIX. Variation.-X. Genesis, Heredity, and Variation.--XI. Classification.--XII. Distribution.

PART III.-THE EVOLUTION OF LIFE.

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 Equilibration.-XIII. The Coöperation 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 them in departments in which our common Educational system is very deficient. The active 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 -nay, we will venture to say of truer emotion-than before. By giving us füller realizations of liberty and justice his writings will tend to increase our self-reliance in the great emergency of civilization to which we have been summoned.-Atlantic Monthly

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