CONTENTS. 



I. 



PACE 



Introduction — Summary of the Results of Linguistic In- 

 quiry — Positive Knowledge preliminary to the Doc- 

 trine OF Descent — Belief in Miracle — The Limits of 

 THE Investigation of Nature i 



II. 



The Animal World in its Present State . . .24 



III. 



The Phenomena of Reproduction in the Animal World . 3g 



IV. 



The Animal World in its Historical and Pal/Eontolog- 



ical Development. 60 



V. 



The Standpoint of the Miraculous, and the Investigation 

 of Nature — Creation or Natural Development — Lin- 

 N^us — Cuvier — Agassiz — Examination of the Idea of 

 Species 82 



VI. 



Natural Philosophy — Goethe — Predestined Transforma- 

 tion according to Richard Owen — Lamarck . . 104 

 vii 



