526 
D 
Dampness, bad effect of, 48 
Danish egg packing industry, 39 
poultry house, 38 
Delivery of products, 427 
Demand vs. supply, 32 
Denmark, poultry farming in, 38 
Depluming mites, 510 
Dermanyssus galline, 508 
Design of houses, simplicity of, 111 
to insure economy of labor, 52 
Details, importance of, 273 
Diagnosis of disease, 500, 501 
Diary, 463 
Digestibility, factors affecting, 174 
ground grains, 181 
Digestion coefficient defined, 174 
experiments, what they show, 176, 177 
relation of food to, 173 
Digestive system, organs of, 296 
tract, 296 
Dimorphism, sexual, 261 
Disease, diagnosis, 500, 501 
inheritance of, 227 
of poultry, 503 
prevention of, 497 
transmission by water, 499 , 
treating, 496 
when to treat, 496 
Diseases, 496 
Disinfecting solution, 498 
Dislocating neck, 410 
Disposition of egg breeds, 79 
of general-purpose breeds, 87 
of meat breeds, 84 
Distance from undesirable institutions, 44 
Distribution of poultry, 10 
Doctoring poultry, 496 
Dominant, how to test for, 232 
meaning in Mendel’s law, 231 
Doors, 119 
Dorking, origin of, 73 
possibility of, 93 
Double matings, example of, 261 
yarding, advantages of, 159 
methods of, 160 
Drainage, 47 
air, 48 
soil, 48 
surface, 47 
under foundation, 126 
Dressed poultry, marketing, 444 
score card for, 491 
Dressing, 417 
Drinking vessels, design, 155 
location, 155 
INDEX 
Dropping platforms, location and design, 
146 
Droppings, care of, 272 
Dry-mash, California, 219 
Cornell, 219 
mixer, location and usage, 206 
New Jersey State (summer), 217 
(winter), 216 
possibilities, 213 
Dry picking, 411, 413, 415 
Duck raising, rise of, 21 
Dust wallows, 151 
Dusting material, 152 
E 
Economic factors, adjustment of, 58 
Economy in handling layers, 275 
Educational associations, 4 
exhibitions, 476 
Egg breeds as sitters, 80 
circles, 450 
classification of, 78 
composition of, 196 
description of type, 78 
disposition of, 79 
dry matter in, 305. 
eating, cause of, 279 
prevention of, 279 
exhibits, 473 
expulsion of, 302 
farming, combinations with, 22 
locations for, 44 
fertilization of, 301 
foraging abilities, 80 
formation of, 300 
grades of, 440 
hardiness of, 80 
maturity of, 79 
ovens, Egyptian, 326 
packages, 436 
pail, 287 
parts of, 302 
passage down oviduct, 301 
preservation, 441 
producing States, conditions in, 11 
production, as affected by physical 
condition, 180 
as affected by temperature, 266 
breeding for, 252 
controlling factors in, 267 
distribution of, 235 
feeding for, 176 
from pure breeds, 96 
how improved, 235, 278 
leading States in, 11 
of meat breeds, 85 
