How Instinct may be best Studied Definition of Instinct Does Man possess Instincts? How Indians travel through unknown and trackless Forests VI.--_The Philosophy of Birds' Nests._ Pp. 211-230 Instinct or Reason in the Construction of Birds' Nests Do Men build by Reason or by Imitation? Why does each Bird build a peculiar kind of Nest? How do young Birds learn to build their first Nest? Do Birds sing by Instinct or by Imitation? Man's Works mainly Imitative How young Birds may learn to build Nests. Birds do Alter and Improve their Nests when altered conditions require it Conclusion VII.--_A Theory of Birds' Nests; showing the relation of certain differences of colour in female birds to their mode of nidification._ Pp. 231-263 Changed Conditions and persistent Habits as influencing Nidification Classification of Nests Sexual differences of Colour in Birds The Law which connects the Colours of Female Birds with the mode of Nidification What the Facts Teach us Colour more variable than Structure or Habits, and therefore the Character which has generally been modified Exceptional cases confirmatory of the above Explanation Real or apparent exceptions to the Law stated at p. 240 Various modes of Protection of Animals Females of some groups require and obtain more Protection than the Males Conclusion VIII.--_Creation by Law._ Pp. 264-301 Laws from which the Origin of Species may be deduced Mr. Darwin's Metaphors liable to Misconception A case of Orchis-structure explained by Natural Selection Adaptation brought about by General Laws Beauty in Nature How new Forms are produced by Variation and Selection The Objection that there are Limits to Variation Objection to the argument from Classification The _Times_ on Natural Selection Intermediate or generalized forms of Extinct Animals an indication of Transmutation or Development Conclusion A Demonstration of the Origin of Species IX.--_The Development of Human Races under the Law of Natural Selection_. Pp. 302-331 Wide difference of Opinion as to Man's Origin Outline of the Theory of Natural Selection Different effects of Natural Selection on Animals and on Man Influence of External Nature in the development of the Human Mind Extinction of Lower Races The Origin of the Races of Man The Bearing of these views on the Antiquity of Man Their Bearing on the Dignity and Supremacy of Man Their Bearing on the future Development of Man Summary Conclusion X.--_The Limits of Natural Selection as applied to Man._ Pp. 333--371 What Natural Selection can Not do