XVI 



ILLUSTRATIONS 



PLATE FACING PAGE 



VII. Upper: Steer fed ration not restricted . . . 162 



Lower : Steer fed greatly restricted ration . . 162 



VIII. Upper : Steer fed ration not restricted . . . 163 



Lower : Steer fed for normal growth .... 163 



IX. Upper : Steer fed generously, at age 120 days . . 164 



Lower : Same at age 27 months 164 



X. Upper : Dam of seven mule foals followed by filly foal 170 



Lower : Filly foal born after seven mule foals . . 170 



XL Upper: Eleventh foal following ten mule foals . . 171 



Lower : Dam of ten mule foals and their filly foal . 171 



XII. Upper : Ninth foal following eight mule foals . .172 



Lower : Foaled after eight mule foals in succession . 172 



XIII. Upper : Twelfth foal following eleven mule foals . 173 

 Lower : Mother of eleven mule foals and their horse 



foal 173 



XIV. Upper : Close in-breeding of fox terrier . . . 228 

 Lower : Eighth generation of intense in-breeding . 228 



XV. In-bred Berkshire 234 



XVI. Cross-bred Hereford- Aberdeen Angus steer . .247 



XVII. Upper: Half-blood buffalo (bison) heifer . . . 249 



Lower : Cross-bred buffalo-cattle bulls . . . 249 



XVIII. Upper : A five-year-old hinny . . . . . . 252 



Lower : Sheep-goat hybrid 252 



XIX. Effect of food supply on development. Side view . 257 



XX. Same. Front view 257 



XXI. Effect of starvation on capacity to grow . . . 258 



XXII. Recovery from starvation 259 



XXIII. Upper : Cow fed corn products 266 



Lower : Calf from cow fed corn products . . . 266 



XXIV. Upper : Cow fed wheat products . . . .267 

 Lower : Calf from cow fed wheat products . . 267 



XXV. Permanent effect of retarded growth . . . .268 



XXVI. Grace Briggs at age 18 years 281 



XXVII. Duchess Skylark Ormsby 282 



XXVIII. Sophie 19th of Hood Farm ' . 283 



XXIX. Daughters of the same sire 286 



XXX. Three generations showing impressive character of 



original dam ....... 287 



XXXI. Result of using a pure-bred sire . . 294 



XXXII. Result of using a scrub sire 295 



