Views and Definitions of Species—How Darwin's differs from that of Agassiz, and from the Common View—Variation, its Causes unknown.—Darwin's Genealogical Tree—Darwin and Agassiz agree in the Capital Facts—Embryology—Physical Connection of Species compatible with Intellectual Connection—How to prove Transmutation.—Known Extent of Variation—Cause of Likeness unknown—Artificial Selection.—Reversion—Interbreeding—Natural Selection.—Classification tentative.—What Darwin assumes.—Argument stated.—How Natural Selection works.—Where the Argument is weakest.—Objections—Morphology and Teleology harmonized.—Theory not atheistical.—Conceivable Modes of Relation of God to Nature
ARTICLE II
DESIGN VERSUS NECESSITY— A DISCUSSION
How Design in Nature can be shown—Design not inconsistent with Indirect
Attainment
ARTICLE III
NATURAL SELECTION NOT INCONSISTENT WITH NATURAL THEOLOGY
PART I.—Premonitions of Darwinism.—A Proper Subject for Speculation.—Summary of Facts and Ideas suggestive of Hypotheses of Derivation
Part II—Limitations of Theory conceded by Darwin.—What Darwinism explains.—Geological Argument strong in the Tertiary Period.— Correspondence between Rank and Geological Succession—Difficulties in Classification.—Nature of Affinity.—No Absolute Distinction between Vegetable and Animal Kingdoms.—Individuality.—Gradation
PART III.—Theories contrasted.—Early Arguments against Darwinism.—Philosophical and Theological Objections—Theory may be theistic.—Final Cause not excluded.—Cause of Variation unknown.—Three Views of Efficient Cause compatible with Theism.—Agassiz's Objections of a Philosophical Nature.—Minor Objections.—Conclusion
ARTICLE IV