ACKNOWLEDGMENTS. 



THE author wishes to express his obligation to a number of 

 persons who have aided in the preparation of the work. To Mr. 

 Morris Roberts, of Maplewood, New Jersey, is due the credit for 

 a number of the pen-and-ink drawings reproduced in the text. 

 Many photographs have been supplied by the Department of 

 Agriculture, experiment stations, and individuals, credits for which 

 are given. Mrs. Harry R. Lewis has materially aided in the com- 

 pletion of the work. Many practical poultrymen and teachers 

 whose names are not mentioned have offered suggestions and 

 encouragement. To all those who have so earnestly aided in the 

 work the author expresses his appreciation and indebtedness. 



The composition tables given in Chapter XI were compiled 

 from analyses from experiment station reports and various com- 

 position tables. The composition of many grains was taken from 

 " Elementary Treatise on Stock Feeds and Feeding," by J. E. 

 Halligan. Valuable material was also obtained from Bulletin 164 

 of the California Experiment Station, entitled " Poultry Feeding," 

 by M. E. Jaffa. The feeding tables in the appendix are almost 

 entirely from this source. 



