- 1Preface
- 2Importance and Bearing of the Inquiry
- 3Spencer’s Examples and Arguments
- 4Diminished Biting Muscles of Lap-Dogs
- 5Crowded Teeth
- 6Blind Cave-Crabs
- 7No Concomitant Variation From Concomitant Disuse
- 8The Giraffe, and Necessity for Concomitant Variation
- 9Alleged Ruinous Effects of Natural Selection
- 10Adverse Case of Neuter Insects
- 11Æsthetic Faculties
- 12Lack of Evidence
- 13Inherited Epilepsy in Guinea-Pigs
- 14Inherited Insanity and Nervous Disorders
- 15Individual and Transmissible Type Not Modified Alike by the Direct…
- 16Darwin’s Examples
- 17Reduced Wings of Birds of Oceanic Islands
- 18Drooping Ears and Deteriorated Instincts
- 19Wings and Legs of Ducks and Fowls
- 20Pigeons’ Wings
- 21Shortened Breast-Bone in Pigeons
- 22Shortened Feet in Pigeons
- 23Shortened Legs of Rabbits
- 24Blind Cave-Animals
- 25Inherited Habits
- 26Tameness of Rabbits
- 27Modifications Obviously Attributable to Selection
- 28Similar Effects of Natural Selection and Use-Inheritance
- 29Inferiority of Senses in Europeans
- 30Short-Sight in Watchmakers and Engravers
- 31Larger Hands of Labourers’ Infants
- 32Thickened Sole in Infants
- 33A Source of Mental Confusion
- 34Weakness of Use-Inheritance
- 35Inherited Injuries
- 36The Motmot’s Tail
- 37Other Inherited Injuries Mentioned by Darwin
- 38Quasi-Inheritance
- 39Miscellaneous Considerations
- 40Inverse Inheritance
- 41Early Origin of the Ova
- 42Marked Effects of Use and Disuse on the Individual
- 43Would Natural Selection Favour Use-Inheritance?
- 44Use-Inheritance an Evil
- 45Varied Effects of Use and Disuse
- 46Use-Inheritance Implies Pangenesis
- 47Pangenesis Improbable
- 48Spencer’s Explanation of Use-Inheritance
- 49Conclusions
- 50Modern Reliance on Use-Inheritance Misplaced
Are the Effects of Use and Disuse Inherited?
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