^^HIS BULLETIN has been written briefly and 
in simple terms for the beginner, and es- 
pecially for members of the Boys’ and Girls’ 
Poultry Clubs. For additional and more com- 
plete information on this subject ask for Farmers’ 
Bulletin 624, “Natural and Artificial Brooding of 
Chickens.” 
Contribution from the Bureau of Animal Industry 
JOHN R. MOHLER, Chief 
Washington, D. C. Issued August, 1920 
