WHAT IS EVOLUTION? 57 



to be taken for the whole. Let the structures of 

 animals and plants in some of their more prominent 

 forms be well known, along with their history in geo 

 logical time, and the attempt to explain their origin 

 by any crude and simple hypotheses like those now 

 current will become unreal as a dream. These 

 .general statements must, however, be tested in the 

 subsequent chapters by an appeal to facts in connec 

 tion with the more important questions raised by 

 modern evolution. 



