GENETICS, A NEW SCIENCE 



which a knowledge of causes in relation to 

 processes, i. e. a scientific knowledge, has 

 shortened and improved practice in quite un- 

 expected ways. So we may not doubt the ulti- 

 mate value in practice of a science of breeding, 

 if such a science can be created. 



A beginning has been made during the last 

 ten years, starting with the rediscovery of 

 Mendel's law of heredity in 1900. This book 

 will be concerned largely with the operations 

 of that law. 



