X CONTENTS. 



Variation thTough Physical Siirromidings. page 



Power of Locality on Mental Characteristics. 

 External Conditions merely Co-factors in the 



Law of Variation. 

 Our Second Proposition. 



His Ethnological Relations ... 72 



Distribution and Varietal Distinctions. 

 Question of Species or Varieties. 

 Plurality or Unity of Origin ? 

 Higher and Lower Varieties. 

 Relations of these in Time and Space. 

 Lowly Origin of the Human Race. 

 Question of Extinct Varieties. 

 Our Third Proposition. 



His Functional Relations .... 87 



Physical and Mental Functions in common with 



other Animals. 

 Man Improvable and Progressive. 

 Influence and Results of this Progression. 

 Man a Modifier of Nature. 

 Spread and Ascension of the Higher, and Decline 



and Extinction of the Lower Varieties. 

 Our F(ywrth Proposition. 



Man : Whence ? 



His Histobical Relations ..... 105 



Tradition Uncertain and Unreliable. 

 All History Recent and Partial. 

 Discrepancies in Chronological Systems. 



