Paul H. Barrett, R. B. Freeman, Peter Gautrey

• Chapter XIII Inheritance continued – Reversion or Atavism; Chapter XIV Inheritance continued, – Fixedness of Character – Prepotency – Sexual Limitation – Correspondence of Age; Chapter XV On Crossing; Chapter XVI Causes Which Interfere with the Free Crossing of Varieties – Influence of Domestication on Fertility; Chapter XVII On the Good Effects of Crossing, and on the Evil Effects of Close Interbreeding; Chapter XVIII On The Advantages and Disadvantages of Changed Conditions of Life: Sterility from Various Causes; Chapter XIX Summary of the Four Last Chapters, with Remarks on Hybridism; Chapter XX Selection by Man; Chapter XXI Selection Continued; Chapter XXII Causes of Variability; Chapter XXIII Direct and Definite Action of the External Conditions of Life; Chapter XXIV Laws of Variation – use and Disuse, Etc.; Chapter XXV Laws of Variation continued – Correlated Variability; Chapter XXVI Laws of Variation continued – Summary; Chapter XXVII Provisional Hypothesis of Pangenesis; Chapter XXVIII Concluding Remarks;

Paul H. Barrett, R. B. Freeman, Peter Gautrey

• Chapter XIII Inheritance continued – Reversion or Atavism; Chapter XIV Inheritance continued, – Fixedness of Character – Prepotency – Sexual Limitation – Correspondence of Age; Chapter XV On Crossing; Chapter XVI Causes Which Interfere with the Free Crossing of Varieties – Influence of Domestication on Fertility; Chapter XVII On the Good Effects of Crossing, and on the Evil Effects of Close Interbreeding; Chapter XVIII On The Advantages and Disadvantages of Changed Conditions of Life: Sterility from Various Causes; Chapter XIX Summary of the Four Last Chapters, with Remarks on Hybridism; Chapter XX Selection by Man; Chapter XXI Selection Continued; Chapter XXII Causes of Variability; Chapter XXIII Direct and Definite Action of the External Conditions of Life; Chapter XXIV Laws of Variation – use and Disuse, Etc.; Chapter XXV Laws of Variation continued – Correlated Variability; Chapter XXVI Laws of Variation continued – Summary; Chapter XXVII Provisional Hypothesis of Pangenesis; Chapter XXVIII Concluding Remarks;

Paul H. Barrett, R. B. Freeman, Peter Gautrey

• Chapter XIII Inheritance continued – Reversion or Atavism; Chapter XIV Inheritance continued, – Fixedness of Character – Prepotency – Sexual Limitation – Correspondence of Age; Chapter XV On Crossing; Chapter XVI Causes Which Interfere with the Free Crossing of Varieties – Influence of Domestication on Fertility; Chapter XVII On the Good Effects of Crossing, and on the Evil Effects of Close Interbreeding; Chapter XVIII On The Advantages and Disadvantages of Changed Conditions of Life: Sterility from Various Causes; Chapter XIX Summary of the Four Last Chapters, with Remarks on Hybridism; Chapter XX Selection by Man; Chapter XXI Selection Continued; Chapter XXII Causes of Variability; Chapter XXIII Direct and Definite Action of the External Conditions of Life; Chapter XXIV Laws of Variation – use and Disuse, Etc.; Chapter XXV Laws of Variation continued – Correlated Variability; Chapter XXVI Laws of Variation continued – Summary; Chapter XXVII Provisional Hypothesis of Pangenesis; Chapter XXVIII Concluding Remarks;