3 4^ 



Of rm 'r 

 UNIVERSITY 



THE GEOLOGICAL EVIDENCES 



OF 



EVOLUTION. 



JUST fifty years ago this year were planted the 

 germs of a train of scientific speculation whose 

 development was destined to mark an epoch in 

 the history of science to work a most profound 

 revolution in the tendencies of modern thought. 

 It was then that Charles Darwin first conceived the 

 idea of investigating that mystery of mysteries, the 

 origin of species, and it was then that he laid the 

 foundation of that remarkable work which some 

 twenty years later was destined to convulse the sci- 

 entific world. Nearly thirty years have now elapsed 



