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 grains 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. 
