| Preface |
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ix | |
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| Acknowledgments |
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xv | |
| Introduction |
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1 | (4) |
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1 Variation Under Domestication |
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5 | (25) |
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5 | (1) |
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Effects of Habit and of the Use or Disuse of Parts; Correlated Variation; Inheritance |
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5 | (2) |
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Character of Domestic Varieties; Difficulties of Distinguishing Between Varieties and Species; Origin of Domestic Varieties from One or More Species |
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7 | (2) |
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Breeds of the Domestic Pigeon, Their Differences and Origin |
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9 | (9) |
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Principles of Selection Anciently Followed, and Their Effects |
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18 | (3) |
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21 | (4) |
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Circumstances Favorable to Man's Power of Selection |
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25 | (2) |
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27 | (3) |
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30 | (13) |
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31 | (1) |
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32 | (5) |
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Wide-Ranging, Much Diffused, and Common Species Vary the Most |
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37 | (1) |
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Species in Larger Genera Vary More Frequently Than Those in Smaller Genera |
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38 | (2) |
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Many Species Included in the Larger Genera Resemble Varieties: They Are Closely Related and Have Restricted Ranges |
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40 | (1) |
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41 | (2) |
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3 The Struggle for Existence |
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43 | (19) |
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The Term "Struggle for Existence" Used in a Larger Sense |
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45 | (1) |
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Exponential Rates of Increase |
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46 | (3) |
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Nature of the Checks to Population Growth Increase |
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49 | (3) |
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Complex Relations of All Animals and Plants to Each Other in the Struggle for Existence |
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52 | (5) |
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The Struggle for Life Is Generally Most Severe Between Individuals and Varieties of the Same Species |
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57 | (5) |
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4 Natural Selection, or the Survival of the Fittest |
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62 | (48) |
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70 | (3) |
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Examples of Natural Selection, or the Survival of the Fittest, in Action |
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73 | (6) |
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On the Outbreeding of Individuals |
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79 | (3) |
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Circumstances Favoring the Production of New Forms Through Natural Selection |
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82 | (5) |
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Extinction Caused by Natural Selection |
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87 | (1) |
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88 | (4) |
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Effects of Natural Selection on the Descendants of a Common Ancestor, Through Divergence of Character and Extinction |
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92 | (8) |
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On the Degree to Which Organisms Tend to Advance in Complexity |
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100 | (4) |
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104 | (2) |
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106 | (4) |
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110 | (32) |
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Effects of Increased Use and Disuse of Parts as Controlled by Natural Selection |
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111 | (6) |
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117 | (2) |
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119 | (3) |
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Compensation and the Economy of Growth |
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122 | (2) |
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Multiple, Rudimentary, and Lowly Organized Structures Are Especially Variable |
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124 | (1) |
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A Part Developed in Any Species to an Extraordinary Degree Tends to Be Highly Variable, in Comparison with the Same Part in Related (Allied) Species |
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124 | (4) |
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Specific Characters Vary More Than Generic Characters |
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128 | (1) |
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Secondary Sexual Characteristics Are Highly Variable |
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129 | (2) |
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Distinct Species Present Analogous Variations, So That a Variety of One Species Often Presents a Trait Typical of a Related Species, or Reverts Back to Some Trait Possessed by an Early Ancestor |
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131 | (7) |
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138 | (4) |
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6 Difficulties with the Theory |
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142 | (47) |
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On the Absence or Rarity of Transitional Varieties |
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143 | (4) |
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On the Origin and Transitions of Organic Beings with Peculiar Habits and Structure |
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147 | (11) |
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Organs of Extreme Perfection and Complication |
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158 | (3) |
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161 | (5) |
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Special Difficulties of the Theory of Natural Selection |
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166 | (8) |
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Organs of Little Apparent Importance, as Affected by Natural Selection |
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174 | (3) |
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Utilitarian Doctrine, How Far True? Beauty, How to Explain It? |
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177 | (7) |
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Summary: The Law of Unity of Type and of the Conditions of Existence Embraced by the Theory of Natural Selection |
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184 | (5) |
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7 Miscellaneous Objections to the Theory of Natural Selection |
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189 | (40) |
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Modifications Not Necessarily Simultaneous |
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190 | (1) |
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Modifications That Are Apparently of No Direct Service |
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191 | (4) |
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Supposed Incompetence of Natural Selection to Account for the Incipient Stages of Useful Structures |
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195 | (18) |
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Widely Different Organs in Members of the Same Class, Developed from One and the Same Source |
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213 | (8) |
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221 | (2) |
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Reasons for Disbelieving in Great and Abrupt Modifications |
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223 | (6) |
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229 | (33) |
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Inherited Changes of Habit or Instinct in Domesticated Animals |
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233 | (3) |
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236 | (15) |
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Objections to the Theory of Natural Selection as Applied to Instincts: Neuter and Sterile Insects |
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251 | (8) |
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259 | (3) |
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262 | (28) |
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263 | (7) |
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Laws Governing the Sterility of First Crosses and Hybrids |
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270 | (6) |
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The Origin and Causes of the Sterility of First Crosses and Hybrids |
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276 | (2) |
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Reciprocal Dimorphism and Trimorphism |
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278 | (4) |
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The Fertility of Varieties When Crossed, and of Their Mongrel Offspring, Is Not Universal |
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282 | (3) |
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Hybrids and Mongrels Compared, Independently of Their Fertility |
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285 | (3) |
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288 | (2) |
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10 On the Imperfection of the Geological Record |
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290 | (30) |
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On the Passage of Time, as Inferred from the Rate of Deposition and Extent of Denudation of Sediments |
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293 | (4) |
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On the Poorness of Paleontological Collections |
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297 | (6) |
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On the Absence of Numerous Intermediate Varieties in Any Single Formation |
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303 | (7) |
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On the Sudden Appearance of Whole Groups of Allied Species |
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310 | (3) |
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On the Sudden Appearance of Groups of Allied Species in the Lowest Known Fossiliferous Strata |
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313 | (7) |
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11 On the Geological Succession of Organic Beings |
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320 | (26) |
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324 | (4) |
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On the Forms of Life Changing Almost Simultaneously Throughout the World |
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328 | (4) |
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On the Affinities of Extinct Species to Each Other, and to Living Forms |
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332 | (5) |
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On the State of Development of Ancient Compared with Living Forms |
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337 | (3) |
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On the Succession of the Same Types Within the Same Areas, During the Later Tertiary Periods |
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340 | (2) |
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Summary of the Preceding and Present Chapters |
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342 | (4) |
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12 Geographical Distribution |
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346 | (27) |
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Single Centers of Supposed Creation |
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351 | (2) |
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353 | (7) |
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Dispersal During the Glacial Period |
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360 | (5) |
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Alternate Glacial Periods in the North and South |
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365 | (8) |
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13 Geographical Distribution, Continued |
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373 | (19) |
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Freshwater Plant and Animal Productions |
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373 | (4) |
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On the Inhabitants of Oceanic Islands |
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377 | (3) |
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Absence of Batrachians and Terrestrial Mammals on Oceanic Islands |
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380 | (3) |
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On the Relations of the Inhabitants of Islands to Those of the Nearest Mainland |
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383 | (5) |
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Summary of Chapters 12 and 13 |
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388 | (4) |
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14 Evidence for Mutual Affinities Among Organic Beings: Evidence from Morphology, Embryology, and Rudimentary Organs |
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392 | (42) |
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402 | (5) |
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On the Nature of the Affinities Connecting Organic Beings |
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407 | (5) |
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412 | (4) |
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Development and Embryology |
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416 | (10) |
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Rudimentary, Atrophied, and Aborted Organs |
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426 | (5) |
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431 | (3) |
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15 Recapitulation and Conclusion |
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434 | (23) |
| Appendix A Other Books by Charles Darwin |
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457 | (4) |
Appendix B People Referred to in These Chapters |
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461 | (10) |
| Illustration Credits |
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471 | (6) |
| Index |
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477 | |