DARWIN'S PROBLEM 



53 



The same was true of sheep breeders, and Darwin talked 

 with them too. " In Saxony," he says, "the importance of 



TYPES OF PIGEON DEVELOPED BY SELECTION AND BREEDING 



i, Jacobins; 2, English Carrier ; 3, Duchess ; 4, Fantails ; 5, Birmingham Tumblers ; 

 6, English Pouter. (From " Domesticated Animals and Plants," by E. Davenport) 



the principle of selection in regard to merino sheep is so 

 fully recognized that men follow it as a trade ; the sheep are 

 placed on the table and are studied like a picture by the' 



