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title
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#
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01-01 - Causes of Variability
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5
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5
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01-02 - Effects of Habit
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1
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6
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01-03 - correlation of Growth
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2
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8
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|
01-04 - Inheritance
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4
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12
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01-05 -Character of Domestic Varieties
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2
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14
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01-06 - Difficulty of distinguishing between Varieties and Species
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2
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16
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01-07 - Origin of Domestic Varieties from one or more Species
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7
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23
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01-08 - Breeds of the Domestic Pigeons, their Differences and Origin
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9
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32
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01-09 - Principles of Selection anciently followed, and their Effects
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6
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38
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01-10 - Methodical and Unconscious Selection
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5
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43
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01-11 - Unknown Origin of our Domestic Productions
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5
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48
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01-12 - Circumstances favourable to Man's Power of Selection
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3
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51
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01-13 - Summary
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2
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53
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02-01 - Variability
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2
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55
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02-02 - Individual Differences
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2
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57
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02-03 - Doubtful Species
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10
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67
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02-04 - Wide-ranging, much diffused, and common Species vary most
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3
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70
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02-05 - Species of the Larger Genera in each Country vary more frequently than the Species of the Smaller Genera
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2
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72
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02-06 - Many of the Species included within the Larger Genera resemble Varieties in being very closely, but unequally, related to each other, and in having restricted ranges
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2
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74
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02-07 - Summary
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2
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76
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03-01 - Bears on Natural Selection
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2
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78
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03-02 - The Term, Struggle for Existence, used in a large sense
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2
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80
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03-03 - Geometrical Ratio of Increase
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2
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82
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03-04 - Rapid Increase of naturalised Animals and Plants
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3
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85
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03-05 - Nature of the Checks to Increase
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2
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87
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03-06 - Competition Universal
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2
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89
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03-07 - Effects of Climate
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2
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91
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03-08 - Protection from the Number of Individuals
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2
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93
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03-09 - Complex Relations of all Animals and Plants Throughout Nature
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5
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98
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03-10 - Struggle for Life most severe between Individuals and Varieties of the same Species
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2
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100
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03-11 - The Relation of Organism to Organism the Most Important of All Relations
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4
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104
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03-12 - Summary
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2
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106
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04-01 - Natural Selection
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5
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111
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04-02 - Its Power Compared with Man's Selection
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2
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113
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04-03 - Its Power on Characters of Trifling Importance
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2
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115
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04-04 - Its Power at All Ages and on Both Sexes
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2
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117
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04-05 - Sexual Selection
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3
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120
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04-06 - On the generality of Intercross Between Individuals of the Same Species
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9
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129
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04-07 - Illustrations of the Action of Natural Selection:
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10
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139
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04-08 - On the Intercrossing of Individuals
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8
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147
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04-09 - Circumstances favourable for the production of new forms through Natural Selection
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12
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159
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04-10 - Extinction caused by Natural Selection
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3
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162
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04-11 - Divergence of Character
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26
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188
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04-12 - On the Degree to which Organisation tends to advance
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11
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199
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04-13 - Convergence of Character
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8
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207
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04-14 - Summary of Chapter
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4
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211
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05-01 - Effects of External Conditions
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2
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213
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05-02 - Use and Disuse of Parts, combined with Natural Selection, Organs of Flight and Vision
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7
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220
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05-03 - Acclimatisation
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4
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224
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05-04 - Correlation of Growth
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5
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229
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05-05 - Compensation and Economy of Growth
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2
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231
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05-06 - False Correlation
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2
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233
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05-07 - Multiple, Rudimentary, and Lowly-organised Structures are Variable
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2
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235
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05-08 - Parts Developed in an Unusual Manner are Highly Variable
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5
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240
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05-09 - Specific Characters more Variable than Generic Characters
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2
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242
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05-10 - Secondary Sexual Characters Variable
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3
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245
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05-11 - Species of the Same Genus Vary in an Analogous Manner
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2
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247
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05-12 - Reversion to Long Lost Characters
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10
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257
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05-13 - Summary
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2
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259
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06-01 - Difficulties on the Theory of Descent with Modification
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5
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264
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06-02 - Transitions
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2
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266
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06-03 - Absence or Rarity of Transitional Varieties
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10
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276
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06-04 - Transitions in Habits of Life
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7
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283
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06-05 - Diversified Habits in the Same Species
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2
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285
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06-06 - Species with Habits Widely Diffferent from those of their Allies
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3
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288
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06-07 - Organs of extreme Perfection
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5
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293
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06-08 - Means of Transition
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6
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299
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06-09 - Cases of Difficulty
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5
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304
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06-10 - Natura Non Facit Saltum
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2
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306
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06-11 - Organs of Small Importance
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6
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312
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06-12 - Organs not in all Cases Absolutely Perfect
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13
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325
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06-13 - Summary: The Law of Unity of Type and of the Conditions of Existence Embraced by the Theory of Natural Selection
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8
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333
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07-01 - Instincts comparable with habits, but different in their origin
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2
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335
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07-02 - Instincts Graduated
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2
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337
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07-03 - Aphides and ants
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1
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338
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07-04 - Instincts variable
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1
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339
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07-05 - Domestic instincts, their origin
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1
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340
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07-06 - Natural instincts of the cuckoo, ostrich, and parasitic bees
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1
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341
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07-07 - Slave-making ants
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1
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342
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07-08 - Hive-bee, its cell-making instinct
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1
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343
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07-09 - Difficulties on the theory of the Natural Selection of instincts
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1
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344
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07-10 - Neuter or sterile insects
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1
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345
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07-11 - Summary
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1
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346
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08-01 - Distinction between the sterility of first crosses and of hybrids
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1
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347
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08-02 - Sterility various in degree, not universal, affected by close interbreeding, removed by domestication
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1
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348
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08-03 - Laws governing the sterility of hybrids
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1
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349
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08-04 - Sterility not a special endowment, but incidental on other differences
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1
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350
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08-05 - Causes of the sterility of first crosses and of hybrids
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1
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351
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08-06 - Parallelism between the effects of changed conditions of life and crossing
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1
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352
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08-07 - Fertility of varieties when crossed and of their mongrel offspring not universal
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1
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353
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08-08 - Hybrids and mongrels compared independently of their fertility
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1
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354
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08-09 - Summary
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1
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355
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09-01 -On the absence of intermediate varieties at the present day
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1
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356
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09-02 - On the nature of extinct intermediate varieties; on their number
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1
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357
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09-03 - On the vast lapse of time, as inferred from the rate of deposition and of denudation
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1
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358
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09-04 - On the poorness of our palaeontological collections
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1
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359
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09-05 - On the intermittence of geological formations
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1
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360
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09-06 - On the absence of intermediate varieties in any one formation
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1
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361
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09-07 - On their sudden appearance in the lowest known fossiliferous strata
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1
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362
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10-01 - On the slow and successive appearance of new species
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1
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363
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10-02 - On their different rates of change
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1
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364
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10-03 - Species once lost do not reappear
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1
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365
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10-04 - Groups of species follow the same general rules in their appearance and disappearance as do single species
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1
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366
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10-05 - On Extinction
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1
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367
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10-06 - On simultaneous changes in the forms of life throughout the world
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1
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368
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10-07 - On the affinities of extinct species to each other and to living species
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1
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369
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10-08 - On the state of development of ancient forms
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1
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370
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10-09 - On the succession of the same types within the same areas
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1
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371
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10-10 - Summary of preceding and present chapters
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1
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372
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11-01 - Present distribution cannot be accounted for by differences in physical conditions
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1
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373
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11-02 - Importance of barriers
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1
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374
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11-03 - Affinity of the productions of the same continent
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1
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375
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11-04 - Centres of creation
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1
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376
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11-05 - Means of dispersal, by changes of climate and of the level of the land, and by occasional means
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2
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378
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11-06 - Dispersal during the Glacial period co-extensive with the world
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1
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379
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12-10 - Distribution of fresh-water productions
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1
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380
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12-20 - On the inhabitants of oceanic islands
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1
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381
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12-30 - Absence of Batrachians and of terrestrial Mammals
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4
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385
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12-40 - On the relations of the inhabitants of islands to those of the nearest mainland
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3
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388
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12-50 - On colonisation from the nearest source with subsequent modification
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10
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398
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12-60 - Summary of the last and present chapters
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4
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402
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13-01 - CLASSIFICATION, groups subordinate to groups
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1
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403
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13-02 - Natural system
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1
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404
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13-03 - Rules and difficulties in classification, explained on the theory of descent with modification
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13
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417
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13-04 - Classification of varieties
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1
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418
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13-05 - Descent always used in classification
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6
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424
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13-06 - Analogical or adaptive characters
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2
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426
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13-07 - Affinities, general, complex and radiating
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2
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428
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13-08 - Extinction separates and defines groups
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4
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432
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13-09 - MORPHOLOGY, between members of the same class, between parts of the same individual
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1
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433
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13-10 - EMBRYOLOGY, laws of, explained by variations not supervening at an early age, and being inherited at a corresponding age
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1
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434
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13-11 - RUDIMENTARY ORGANS; their origin explained
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1
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435
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13-12 - Summary
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1
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436
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14-01 - Recapitulation of the difficulties on the theory of Natural Selection
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7
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443
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14-02 - Recapitulation of the general and special circumstances in its favour
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10
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453
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14-03 - Causes of the general belief in the immutability of species
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13
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466
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14-04 - How far the theory of natural selection may be extended
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1
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467
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14-05 - Effects of its adoption on the study of Natural history
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5
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472
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14-06 - Concluding remarks
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2
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474
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wolfs
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1
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475
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