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ACKNOWLEDGMENT 



The tables used in this book are taken from the 

 published reports of the United States Department of 

 Agriculture, and adapted to the needs of this publica- 

 tion. Only averages and approximate values are 

 given. Conditions vary so widely that accuracy is 

 impossible. The value of the tables lies in familiarity 

 with their use rather than in the numerical results 

 obtained from them. We extend our thanks to L. 

 Lewellin & Sons, Percheron Breeders, Waterloo, and 

 J. \Y. Martin, Red Polled Breeder, Richland Center, 

 Wis. Grateful acknowledgment is also made to the 

 University of Wisconsin for material used in illustra- 

 tion, and to the friends who have given us valuable as- 

 sistance and suggestions. H. & H. 



