xii ACKNOWLEDGMENTS 



those which should receive special mention for material made 

 use of. The department of biology of the University of Maine 

 has taken a leading place in the field of poultry diseases and the 

 inheritance of egg production. Many ideas and facts are taken 

 from the work at this station. The Federal Department of Agri- 

 culture, especially in the Bureau of Animal Industry and Bureau 

 of Chemistry, has made valuable discoveries pertaining to the 

 handling, storing, and marketing of eggs and poultry. The prac- 

 tical application of many of these has been outlined. 



The composition tables given in Chapter XI were compiled 

 from analyses from Experiment Station Reports, more especially 

 those from New Jersey. The composition of many grams was 

 taken from " Elementary Treatise on Stock Feeds and Feeding," 

 by J. E. Halligan. Valuable material was also obtained from 

 Bulletin No. 164 of the California Experiment Station, entitled 

 "Poultry Feeding," by M. E. Jaffa. The feeding tables in the 

 appendix are almost entirely from that source. 



Many photographs have been kindly supplied by the Federal 

 Department, by experiment stations, and by individuals, credits 

 for which are given where they appear. All photographs not 

 credited were taken by the author, many of them being from the 

 New Jersey Agricultural Experiment Station. 



In order to make uniform background the publishers had 

 many of the photographs retouched, necessarily eliminating the 

 artist's name in a number of cases. The majority of the photo- 

 graphs so retouched were of artists' drawings by Louis Paul 

 Graham. 



At the end of each chapter will be found a list of reference 

 bulletins to which the author has referred and to which the stu- 

 dent can refer with the assurance of much valuable aid. 



In conclusion, the acknowledgments would not be complete 

 without expressing my feeling of indebtedness to the general 

 agricultural and poultry literature which at various times has 

 been studied and consulted by the author as student, teacher, 

 and writer. The following books should receive special mention 

 as having been studied as a text or reference work: 



" Poultry Keeping as an Industry for Farmers and Cottagers," by Edward 



Brown. 

 "Progressive Poultry Culture," by A. A. Brigham. 



