Chapter 1.1-1.7

Chapter Ⅰ: Variation Under Domestication
1.1 Causes of Variability ---- 00:00
1.2 Effects Of Habit And Of The Use Or Disuse Of Parts; Correlated Variation; Inheritance ---- 11:46
1.3 Character Of Domestic Varieties; Difficulty Of Distinguishing Between Varieties And Species; Origin Of Domestic Varieties From One Or More Species ---- 23:34
1.4 Breeds Of The Domestic Pigeon, Their Differences And Origin ---- 36:13
1.5 Principles Of Selection Anciently Followed, And Their Effects ---- 58:34
1.6 Unconscious Selection ---- 70:41
1.7 Circumstances Favourable To Man's Power Of Selection ---- 85:11