EFFECT OF NATURAL SELECTION 97 
Meanwhile we leave it here to develop another and a newer method of 
improvement, based on a more careful study and a more minute knowledge 
of the reai constitution of living beings. 
Exercise. Give the history of some breed of domestic animal, — cattle, 
horse, sheep, pig, dog, or chicken. 
References. 1.‘ Types and Breeds of Farm Animals.” Plumb. 
2. “ Dogcraft.” Hachwalt. 
3. “Survival of the Unlike.” Bailey. 
