xviii ILLUSTRATIONS 



128. Strong and Weak Males 255 



129. Wedge or Angular Shape Common in Good Layers 257 



130. Belle of Jersey and Lady Cornell, Two Phenomenal Hens 258 



131. A Light Brahma Pair 260 



132. An Example of Sexual Dimorphism 261 



133. A Prize-winning Pair of Columbian Wyandottes 262 



134. Relation Between Yield, Temperature and Selling Price of Eggs. . 266 



135. White Leghorns 267 



136. Ideal Individuals of the Single-comb White Leghorn Breed 268 



137. A Large-unit Laying Flock 271 



138. A Simple and Efficient Disinfecting Outfit 273 



139. The Egg-collecting Pail 287 



140. Desirable and Undesirable Types of Hatching Eggs 288 



141. Skeleton of the Fowl 293 



142. The Digestive Tract 296 



143. Circulatory System of the Fowl 297 



144. Male Reproductive System 298 



145. Female Reproductive Organs f 301 



146. Parts of the Completed Egg 303 



147. Abnormal Eggs Compared with Normal One 306 



148. Chick Embryo Thirty-six Hours Old 308 



149. Chick Embryo Three Days Old 308 



150. Hatching Time 311 



151. Two Common Types of Sitting Coops 316 



152. Manner of Toe Punching for Baby Chicks 321 



153. A Good, Yet Simple, Chick Leg Band 322 



154. An Average-sized Flock by Natural Incubation 324 



155. Working Plans for Incubator Cellar 328 



156. Views Showing Construction of Hollow-tile Incubator Cellar 329 



157. A Common Type of Hot-air Incubator 331 



158. Modern Mammoth Incubators 332 



159. A Complete Self-regulating Device for Incubators 333 



160. Interior View of Incubator Cellar 340 



161. A Useful, Home-made Egg Tester 343 



162. Eggs Seven Days in Incubator as Seen When Tested 344 



163. Three Different Types of Long Brooder Houses 349 



164. Mammoth Hot-water Brooders 351 



165. Portable Indoor Hovers 352 



166. Small Portable Outdoor Brooders 352 



167. Colony Brooder Houses 353 



168. Portable Gasoline Brooder Houses 355 



169. Chicks Showing Pronounced Symptoms of White Diarrho?a 364 



170. Growing Poultry on Free Range 369 



171. Rearing Chickens under Intensive Conditions 370 



172. A Desirable Rotation of Crops for Poultry Runs 372 



173. Four Types of Summer Developing Houses . 373 



